Question

Solve the following system of equations using the elimination method.

2x + 4y = 10

–2x + y = –15
Question 10 options:

A)

(–2,7)

B)

(7,–1)

C)

(3,1)

D)

(8,–3)

Answer 1

The answer would be B, (7,-1) because of what happens when you plug in the numbers. For the first equation, 2x+4y=10 would become 2(7)+4(-1)=10 which turns into 10=10 resulting in a true statement. For the next one, -2x+y=-15 which becomes -2(7)+(-1)=-15 which results in -15=-15 meaning B is the true answer for both equations