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-3(m-99)=-3
We move all terms to the left:
-3(m-99)-(-3)=0
We add all the numbers together, and all the variables
-3(m-99)+3=0
We multiply parentheses
-3m+297+3=0
We add all the numbers together, and all the variables
-3m+300=0
We move all terms containing m to the left, all other terms to the right
-3m=-300
m=-300/-3
m=+100
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