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When you will have to solve a system of linear equations in a later math class, you will usually not be told which method to use. You will need to make that decision yourself. So you’ll want to choose the method that is easiest to do and minimizes your chance of making mistakes.
For each system of linear equations decide whether it would be more convenient to solve it by substitution or elimination. Explain your answer.
ⓐ ⓑ
ⓐ
Since both equations are in standard form, using elimination will be most convenient.
ⓑ
Since one equation is already solved for
y , using substitution will be most convenient.
For each system of linear equations, decide whether it would be more convenient to solve it by substitution or elimination. Explain your answer.
ⓐ ⓑ
ⓐ Since both equations are in standard form, using elimination will be most convenient. ⓑ Since one equation is already solved for , using substitution will be most convenient.
For each system of linear equations, decide whether it would be more convenient to solve it by substitution or elimination. Explain your answer.
ⓐ ⓑ
ⓐ Since one equation is already solved for , using substitution will be most convenient; ⓑ Since both equations are in standard form, using elimination will be most convenient.
Access these online resources for additional instruction and practice with solving systems of linear equations by elimination.
Solve a System of Equations by Elimination
In the following exercises, solve the systems of equations by elimination.
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