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5(4m-10)=30
We move all terms to the left:
5(4m-10)-(30)=0
We multiply parentheses
20m-50-30=0
We add all the numbers together, and all the variables
20m-80=0
We move all terms containing m to the left, all other terms to the right
20m=80
m=80/20
m=4
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