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-m-20=18+18+6m
We move all terms to the left:
-m-20-(18+18+6m)=0
We add all the numbers together, and all the variables
-m-(6m+36)-20=0
We add all the numbers together, and all the variables
-1m-(6m+36)-20=0
We get rid of parentheses
-1m-6m-36-20=0
We add all the numbers together, and all the variables
-7m-56=0
We move all terms containing m to the left, all other terms to the right
-7m=56
m=56/-7
m=-8
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