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?

-x - 2y = -4
3x + y = 12

-2y - 4

2y - 4

2y + 4

-2y + 4

Answer 1

@WordGEEK

Answer 2

@tHe_FiZiCx99

Answer 3

Ok you want to isolate x in the first equation. You have -x-2y=4
Divide both sides by -1 so that you can get x to be positive. You would then have x+2y=4
Subtract 2y from both sides and you will have isolated x which results in x=4-2y
or in other words answer choice 4. -2y+4