6.02] 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

8 + 2x

8 − 2x

−8 − 2x

−8 + 2x

Question

6.02] 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 

 8 + 2x 

 8 − 2x 

 −8 − 2x 

 −8 + 2x

anonymous · Answer

to isolate y is to put it on one side of the equation by itself. try that.

anonymous · Answer

Uh, I don't know, c?

anonymous · Answer

2x + y = 8
take this equation and rearrange it so y is on the side by itself

anonymous · Answer

I'm confused. How do u do that?

anonymous · Answer

2x+y=8
2x+y-2x=8-2x
y=8-2x

anonymous · Answer

take 2x away from both sides. The equation is still legit and it works :)

anonymous · Answer

So d?

anonymous · Answer

b :)

anonymous · Answer

Ok, thx so much! :D I don't understand this!!|dw:1353616269478:dw| happy thanksgiving!!