Question

Find a solution to the following system of equations. -3x+3y=-9 -3x+y=7

Answer 1

(-5, -8)

Explanation:

-3x+3y=-9

-3x+y=7

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simplify -3x+3y=-9 into x-y=3

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y=x-3

-3x+y=7

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-3x+(x-3)=7

-3x+x-3=7

-2x-3=7

-2x=7+3

-2x=10

x=10/-2=-5

y=-5-3=-8

x=-5, y=-8