For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation? (5 points)

−x − 2y = −4
3x + y = 12

Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation? (5 points)

−x − 2y = −4
3x + y = 12

needhelpinalgebra · Answer

choices: 
−2y − 4
	2y − 4
	2y + 4
	−2y + 4

anonymous · Answer

Confusing wording, but it's saying "if you made x= ????? using the first equation, what would be the ?????"
-x-2y=-4
Add x to both sides
-2y=-4+x
add 4 to both sides
4-2y=x

needhelpinalgebra · Answer

it is saying if you isolated x, making it be by itself. now it wants to use the substitution method, which i can't understand, given the choices.

needhelpinalgebra · Answer

@AloneS

anonymous · Answer

I just typed up the answer for you
It's -2y+4

needhelpinalgebra · Answer

oh, cool. Sorry and thanks.