SOLUTION: Solve using either substitution or addition method. Tell which method was used? x=y+9 5x-3y=7

SOLUTION: Solve using either substitution or addition method. Tell which method was used? x=y+9 5x-3y=7

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Question 171043: Solve using either substitution or addition method. Tell which method was used?
x=y+9
5x-3y=7
Answer by HyperBrain(694) (Show Source): You can put this solution on YOUR website!
x=y+9
5x-3y=7
Substituting x=y+9,
5(y+9)-3y=7
5y-3y+45=7
2y=-38
y=-19
x=-19+9=-10
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