Question

How do I do this
X+y=-4
3x-6y=15

Answer 1

x=-1, y=-3. (-1, -3).

Explanation:

x+y=-4

3x-6y=15

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x=-4-y

3(-4-y)-6y=15

-12-3y-6y=15

-12-9y=15

9y=-12-15

9y=-27

y=-27/9

y=-3

x+(-3)=-4

x-3=-4

x=-4+3

x=-1