0
Anonymous
-3m = 5m+8
-3m-5m = 8
-8m = 8
m = -1
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If 3m - 7 = 8, then m = 5
-8 + (5m - 6m) = -8 + (-m) = -8 - m
40
6m + 20 = 9m - 4 24 = 3m m = 8
It is the property that equals plus equals are equals.