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42=-10+2m
We move all terms to the left:
42-(-10+2m)=0
We add all the numbers together, and all the variables
-(2m-10)+42=0
We get rid of parentheses
-2m+10+42=0
We add all the numbers together, and all the variables
-2m+52=0
We move all terms containing m to the left, all other terms to the right
-2m=-52
m=-52/-2
m=+26
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