SOLUTION: how do i solve x-y=-10 in a three equation 3x4y=12

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Question 678220: how do i solve x-y=-10 in a three equation
3x4y=12

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

3x4y=12...post this question again...here is missing sign or something...

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