Question

Equations

Answer 1

Add the equations together and solve for y.

Answer 2

well im getting the answer A or B

Answer 3

Don't guess, do the work.

Answer 4

and those are both wrong.

Answer 5

See that -3 and 3 cancel out? Then just add -12 + 2 = -10y

9 + 8 = 17

-10y = 17
/-10 /-10

y = ??

Answer 6

im not guessing thats how i got the answer A or B and what its landing me on is B -1/10

Answer 7

Could ya show your work so I can see where you're going wrong?

Answer 8

3x - 12y=9
3x=9 + 12y
x=3 + 4y
-3x + 2y =8

Answer 9

oh wai t i see i was getting mixed up its D

Answer 10

Yup, you added 12y to both sides

Answer 11

you don't have to use substitution..
just use elimination it's the simplest and fastest way.

Answer 12

See that both 3x and -3x cancel out..? then just add both equations and solve