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20-3m=-3(4m+11)
We move all terms to the left:
20-3m-(-3(4m+11))=0
We calculate terms in parentheses: -(-3(4m+11)), so:We get rid of parentheses
-3(4m+11)
We multiply parentheses
-12m-33
Back to the equation:
-(-12m-33)
-3m+12m+33+20=0
We add all the numbers together, and all the variables
9m+53=0
We move all terms containing m to the left, all other terms to the right
9m=-53
m=-53/9
m=-5+8/9
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