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-151=-8m-7
We move all terms to the left:
-151-(-8m-7)=0
We get rid of parentheses
8m+7-151=0
We add all the numbers together, and all the variables
8m-144=0
We move all terms containing m to the left, all other terms to the right
8m=144
m=144/8
m=18
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