Unit 7 Review

Solve the system of equations

y=2x-4

y=-x+2

Solve the system of equations using substitution and perform a check by substituting your solution into the original equations.

y=3x

x+2y=-21

Solve the system of two linear equations below algebraically using substitution.

7x+y=6

y=x-2

Determine an appropriate strategy and solve the following system of equations.

y=-4x

y=2x+3

Abigail decided to solve the following system of two linear equations by graphing. Do you agree or disagree with Abigail’s decision? Why?

-6x+5y=4

x-5y=16

Determine an appropriate strategy and solve the following system of equations.

-2x+2y=-2

3x+4y=11