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20m-8=22m-66
We move all terms to the left:
20m-8-(22m-66)=0
We get rid of parentheses
20m-22m+66-8=0
We add all the numbers together, and all the variables
-2m+58=0
We move all terms containing m to the left, all other terms to the right
-2m=-58
m=-58/-2
m=+29
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