Provide the solution to the system.
3x – 6y = 12
9x + 2y = –24

Question

Provide the solution to the system.
3x – 6y = 12 
9x + 2y = –24

ghazi · Answer

multiply equation one that is 3x-6y=12 by 3 and subtract it from next equation ..you'll get y

anonymous · Answer

Divide first equation by 3: x-2y=4 and rearraneg to get x=2y+4
Substitute into second: 9(2y+4)+2y=-24
Expand: 18y +36 +2y = -24
Simplify: 20y = -60
Divide by 20: y=-3.
Substitute y=-3 into one of the equations, say the 1st:
3x+18=12 -> 3x=-6 ->x=-2

anonymous · Answer

@ghazi  i got -3/4?

ghazi · Answer

y=3

anonymous · Answer

If you are unsure of your answer, find the corresponding x value for your y value using one of the equations. Then substitute both into the other equation to make sure it holds.

ghazi · Answer

you should get y= 3 and x=10

anonymous · Answer

Okay thank you i figured out my problem.

ghazi · Answer

hope you got the answer..it's x=-2, y=-3