Solving Equations by Substitution and Elimination

Does solving a system of linear equations by graphing give the same solution as solving by substitution?

• Yes

• Maybe

• Sometimes

• No

Solve the system by elimination.

2x+y=4

−2x+2y=5

• (1,7)

• (-0.5, -3)

• (1/2,3)

• None of the above

Solve the system by substitution.

x=2y+2

2x−5y=1

• (8,3)

• (6--2)

• None of the above

• (-8,-3)

Solve the system by substitution.

y=x−8

y=2x−14

• (-6,2)

• (6,-2)

• (-6,-2)

• None of the above