Question

For the following system, if you isolated y in the first equation to use the Substitution Method, what expression would you substitute into the second equation?

2x + y = 8
−x − y = −5

Answer 1

y = 8 -2x ---1
-x-y = -5 ---2
-x-(8-2x) = -5 --- solve for x

Answer 2

oops i forgot the choices! here u go!
8 + 2x
8 – 2x
–8 − 2x
–8 + 2x

Answer 3

8 - 2x