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Solve an Equation with Constants on Both Sides

In the following exercises, solve the equation for the variable.

−14 q 15 = 13

−2

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Solve an Equation with Variables on Both Sides

In the following exercises, solve the equation for the variable.

−15 r 8 = −11 r

2

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Solve an Equation with Variables and Constants on Both Sides

In the following exercises, solve the equations for the variable.

8 q 5 = 5 q 20

−5

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9 c + 7 = −2 c 37

−4

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8 y 30 = −2 y + 30

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12 x 17 = −3 x + 13

2

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5 4 c 3 = 1 4 c 16

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4 3 m 7 = 1 3 m 13

6

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11 1 4 a = 3 4 a + 4

7

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5 4 a + 15 = 3 4 a 5

−40

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3 5 p + 2 = 4 5 p 1

3

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14 n + 8.25 = 9 n + 19.60

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13 z + 6.45 = 8 z + 23.75

3.46

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2.4 w 100 = 0.8 w + 28

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2.7 w 80 = 1.2 w + 10

60

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5.6 r + 13.1 = 3.5 r + 57.2

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6.6 x 18.9 = 3.4 x + 54.7

23

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Solve an Equation Using the General Strategy

In the following exercises, solve the linear equation using the general strategy.

14 ( y 6 ) = −42

3

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−7 ( 3 n + 4 ) = 14

−2

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3 5 ( 10 x 5 ) = 27

5

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5 ( 1.2 u 4.8 ) = −12

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4 ( 2.5 v 0.6 ) = 7.6

0.52

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0.5 ( 16 m + 34 ) = −15

0.25

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( t 8 ) = 17

−9

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8 ( 6 b 7 ) + 23 = 63

2

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13 + 2 ( m 4 ) = 17

6

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−9 + 6 ( 5 k ) = 12

3/2

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18 ( 9 r + 7 ) = −16

3

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11 4 ( y 8 ) = 43

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18 2 ( y 3 ) = 32

−4

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9 ( p 1 ) = 6 ( 2 p 1 )

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3 ( 4 n 1 ) 2 = 8 n + 3

2

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9 ( 2 m 3 ) 8 = 4 m + 7

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5 ( x 4 ) 4 x = 14

34

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8 ( x 4 ) 7 x = 14

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5 + 6 ( 3 s 5 ) = −3 + 2 ( 8 s 1 )

10

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−12 + 8 ( x 5 ) = −4 + 3 ( 5 x 2 )

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4 ( x 1 ) 8 = 6 ( 3 x 2 ) 7

2

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7 ( 2 x 5 ) = 8 ( 4 x 1 ) 9

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Everyday math

Making a fence Jovani has a fence around the rectangular garden in his backyard. The perimeter of the fence is 150 feet. The length is 15 feet more than the width. Find the width, w , by solving the equation 150 = 2 ( w + 15 ) + 2 w .

30 feet

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Concert tickets At a school concert, the total value of tickets sold was $1,506. Student tickets sold for $6 and adult tickets sold for $9. The number of adult tickets sold was 5 less than 3 times the number of student tickets. Find the number of student tickets sold, s , by solving the equation 6 s + 9 ( 3 s 5 ) = 1506 .

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Coins Rhonda has $1.90 in nickels and dimes. The number of dimes is one less than twice the number of nickels. Find the number of nickels, n , by solving the equation 0.05 n + 0.10 ( 2 n 1 ) = 1.90 .

8 nickels

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Fencing Micah has 74 feet of fencing to make a rectangular dog pen in his yard. He wants the length to be 25 feet more than the width. Find the length, L , by solving the equation 2 L + 2 ( L 25 ) = 74 .

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Writing exercises

When solving an equation with variables on both sides, why is it usually better to choose the side with the larger coefficient as the variable side?

Answers will vary.

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Solve the equation 10 x + 14 = −2 x + 38 , explaining all the steps of your solution.

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What is the first step you take when solving the equation 3 7 ( y 4 ) = 38 ? Explain why this is your first step.

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Solve the equation 1 4 ( 8 x + 20 ) = 3 x 4 explaining all the steps of your solution as in the examples in this section.

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Using your own words, list the steps in the General Strategy for Solving Linear Equations.

Answers will vary.

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Explain why you should simplify both sides of an equation as much as possible before collecting the variable terms to one side and the constant terms to the other side.

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Self check

After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section.

.

What does this checklist tell you about your mastery of this section? What steps will you take to improve?

Questions & Answers

what is microbiology
Agebe Reply
What is a cell
Odelana Reply
what is cell
Mohammed
how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
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Source:  OpenStax, Prealgebra. OpenStax CNX. Jul 15, 2016 Download for free at http://legacy.cnx.org/content/col11756/1.9
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