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4m-2(m=4)
We move all terms to the left:
4m-2(m-(4))=0
We multiply parentheses
4m-2m+8=0
We add all the numbers together, and all the variables
2m+8=0
We move all terms containing m to the left, all other terms to the right
2m=-8
m=-8/2
m=-4
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