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
-8 - 2x
-8 + 2x
8 + 2x
8 - 2x

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
		-8 - 2x
		-8 + 2x
		8 + 2x
		8 - 2x

anonymous · Answer

So, isolate y in the first equation and what do you get?
If you only had the first equation and you were trying to solve for y, what would you do?

anonymous · Answer

would it be 8-2x

anonymous · Answer

Yes, the only thing you have to do to get y by itself is subtract 2x from both sides.

anonymous · Answer

okay thanks