SOLUTION: Solve the system by substitution. 3x – y = –7 x + y = –9

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Question 108316: Solve the system by substitution.
3x – y = –7
x + y = –9

Answer by HyperBrain(694)   (Show Source): You can put this solution on YOUR website!




but, . So,









Solving for y,






THerefore, x=-5 and x=-4

Power up,
HyperBrain!

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