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2-11m=2m+21
We move all terms to the left:
2-11m-(2m+21)=0
We get rid of parentheses
-11m-2m-21+2=0
We add all the numbers together, and all the variables
-13m-19=0
We move all terms containing m to the left, all other terms to the right
-13m=19
m=19/-13
m=-1+6/13
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