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90=-2(-8m+3)
We move all terms to the left:
90-(-2(-8m+3))=0
We calculate terms in parentheses: -(-2(-8m+3)), so:We get rid of parentheses
-2(-8m+3)
We multiply parentheses
16m-6
Back to the equation:
-(16m-6)
-16m+6+90=0
We add all the numbers together, and all the variables
-16m+96=0
We move all terms containing m to the left, all other terms to the right
-16m=-96
m=-96/-16
m=+6
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