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Anonymous
If 3m - 7 = 8, then m = 5
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-3m = 5m+8 -3m-5m = 8 -8m = 8 m = -1
If I am correct, 9 plus 7 equals 112.
6m + 20 = 9m - 4 24 = 3m m = 8
-8 plus 15 = 7
9 plus 7 equals 144. Generally, x plus y = x(x+y).