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-2(m+-13)=8
We move all terms to the left:
-2(m+-13)-(8)=0
We add all the numbers together, and all the variables
-2(m-13)-8=0
We multiply parentheses
-2m+26-8=0
We add all the numbers together, and all the variables
-2m+18=0
We move all terms containing m to the left, all other terms to the right
-2m=-18
m=-18/-2
m=+9
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