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20=4(m+2)
We move all terms to the left:
20-(4(m+2))=0
We calculate terms in parentheses: -(4(m+2)), so:We get rid of parentheses
4(m+2)
We multiply parentheses
4m+8
Back to the equation:
-(4m+8)
-4m-8+20=0
We add all the numbers together, and all the variables
-4m+12=0
We move all terms containing m to the left, all other terms to the right
-4m=-12
m=-12/-4
m=+3
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