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

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

solomonzelman · Answer

the best method here is Elimination.

Add the 2 equations together

solomonzelman · Answer

Ok, they, though, need substitution.

Isolate the "y" in the first equation (can you do that?)

solomonzelman · Answer

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

anonymous · Answer

y = 2

legends · Answer

Did you get the answer?