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-86=-2(1+6m)
We move all terms to the left:
-86-(-2(1+6m))=0
We add all the numbers together, and all the variables
-(-2(6m+1))-86=0
We calculate terms in parentheses: -(-2(6m+1)), so:We get rid of parentheses
-2(6m+1)
We multiply parentheses
-12m-2
Back to the equation:
-(-12m-2)
12m+2-86=0
We add all the numbers together, and all the variables
12m-84=0
We move all terms containing m to the left, all other terms to the right
12m=84
m=84/12
m=7
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