For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?
2x + y = 9
−x − y = −8

−8 + y

−8 − y

8 + y

8 − y

Question

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?
2x + y = 9
−x − y = −8

−8 + y 

 −8 − y 

 8 + y 

 8 − y

anonymous · Answer

Can you solve for x in the second equation?

anonymous · Answer

Hint: start by adding "y" to both sides. (Forget about the first equation)

anonymous · Answer

I don't know