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31=11-m
We move all terms to the left:
31-(11-m)=0
We add all the numbers together, and all the variables
-(-1m+11)+31=0
We get rid of parentheses
1m-11+31=0
We add all the numbers together, and all the variables
m+20=0
We move all terms containing m to the left, all other terms to the right
m=-20
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