Question

2x – 3y = 12
-x – 3y = -6 find the points.

Answer 1

Divide the second equation by -1, then add both equations together.

Answer 2

If you subtract the two equations (this is the same as multiplying one of the equations by -1 and then adding them), the terms with y will cancel out

2x – 3y = 12
- ( -x – 3y = -6)
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3x = 18
x = 6

You can plug that back into on of the original equations to solve for y

2(6) - 3y = 12
-3y = 0
y = 0