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Y=2x+7 3x-y=-9 Solve each system of equation by the substitution method.
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12 votes
Y=2x+7

3x-y=-9

Solve each system of equation by the substitution method.

User Roger Binns
by
6.0k points

1 Answer

8 votes
plug in the first equation into the he second equation

3x-(2x+7)=-9
3x-2x-7=-9
x-7=-9
x=-2

plug in x=-2 into the first equation

y=2(-2)+7
y=-4+7
y=3

answer: (-2,3)
User Ruslan Isay
by
6.6k points
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