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Nine from some number is four.

x 9 = 4 size 12{x - 9=4} {}

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Five less than some quantity is eight.

x 5 = 8 size 12{x - 5=8} {}

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Exercises

Translate each phrase or sentence to a mathematical expression or equation.

A quantity less twelve.

x 12 size 12{x - "12"} {}

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Six more than an unknown number.

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A number minus four.

x 4 size 12{x - 4} {}

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A number increased by one.

x + 1 size 12{x+1} {}

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A number decreased by ten.

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Negative seven added to some number.

7 + x size 12{ - 7+x} {}

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Negative nine added to a number.

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A number plus the opposite of six.

x + 6 size 12{x+ left ( - 6 right )} {}

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A number minus the opposite of five.

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A number minus the opposite of negative one.

x 1 size 12{x - left [ - left ( - 1 right ) right ]} {}

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A number minus the opposite of negative twelve.

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Eleven added to three times a number.

3 x + 11 size 12{3x+"11"} {}

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Six plus five times an unknown number.

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Twice a number minus seven equals four.

2 x 7 = 4 size 12{2x - 7=4} {}

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Ten times a quantity increased by two is nine.

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When fourteen is added to two times a number the result is six.

14 + 2 x = 6 size 12{"14"+2x=6} {}

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Four times a number minus twenty-nine is eleven.

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Three fifths of a number plus eight is fifty.

3 5 x + 8 = 50 size 12{ { {3} over {5} } x+8="50"} {}

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Two ninths of a number plus one fifth is forty-one.

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When four thirds of a number is increased by twelve, the result is five.

4 3 x + 12 = 5 size 12{ { {4} over {3} } x+"12"=5} {}

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When seven times a number is decreased by two times the number, the result is negative one.

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When eight times a number is increased by five, the result is equal to the original number plus twenty-six.

8 x + 5 = x + 26 size 12{8x+5=x+"26"} {}

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Five more than some number is three more than four times the number.

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When a number divided by six is increased by nine, the result is one.

x 6 + 9 = 1 size 12{ { {x} over {6} } +9=1} {}

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A number is equal to itself minus three times itself.

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A number divided by seven, plus two, is seven­teen.

x 7 + 2 = 17

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A number divided by nine, minus five times the number, is equal to one more than the number.

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When two is subtracted from some number, the result is ten.

x 2 = 10 size 12{x - 2="10"} {}

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When four is subtracted from some number, the result is thirty-one.

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Three less than some number is equal to twice the number minus six.

x 3 = 2 x 6 size 12{x - 3=2x - 6} {}

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Thirteen less than some number is equal to three times the number added to eight.

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When twelve is subtracted from five times some number, the result is two less than the original number.

5 x 12 = x 2 size 12{5x - "12"=x - 2} {}

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When one is subtracted from three times a num­ber, the result is eight less than six times the original number.

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When a number is subtracted from six, the result is four more than the original number.

6 x = x + 4 size 12{6 - x=x+4} {}

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When a number is subtracted from twenty-four, the result is six less than twice the number.

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A number is subtracted from nine. This result is then increased by one. The result is eight more than three times the number.

9 x + 1 = 3 x + 8 size 12{9 - x+1=3x+8} {}

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Five times a number is increased by two. This result is then decreased by three times the num­ber. The result is three more than three times the number.

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Twice a number is decreased by seven. This re­sult is decreased by four times the number. The result is negative the original number, minus six.

2 x 7 4 x = x 6 size 12{2x - 7 - 4x= - x - 6} {}

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Fifteen times a number is decreased by fifteen. This result is then increased by two times the number. The result is negative five times the original number minus the opposite of ten.

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Exercises for review

( [link] ) 8 9 size 12{ { {8} over {9} } } {} of what number is 2 3 size 12{ { {2} over {3} } } {} ?

3 4 size 12{ { {3} over {4} } } {}

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( [link] ) Find the value of 21 40 + 17 30 size 12{ { {"21"} over {"40"} } + { {"17"} over {"30"} } } {} .

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( [link] ) Find the value of 3 1 12 + 4 1 3 + 1 1 4 size 12{3 { {1} over {"12"} } +4 { {1} over {3} } +1 { {1} over {4} } } {} .

8 2 3 size 12{8 { {2} over {3} } } {}

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( [link] ) Convert 6 . 11 1 5 size 12{6 "." "11" { {1} over {5} } } {} to a fraction.

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( [link] ) Solve the equation 3 x 4 + 1 = 5 size 12{ { {3x} over {4} } +1= - 5} {} .

x = 8 size 12{x= - 8} {}

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Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
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Source:  OpenStax, Fundamentals of mathematics. OpenStax CNX. Aug 18, 2010 Download for free at http://cnx.org/content/col10615/1.4
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