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-2-8m=-10-9m-2
We move all terms to the left:
-2-8m-(-10-9m-2)=0
We add all the numbers together, and all the variables
-8m-(-9m-12)-2=0
We get rid of parentheses
-8m+9m+12-2=0
We add all the numbers together, and all the variables
m+10=0
We move all terms containing m to the left, all other terms to the right
m=-10
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