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5m-7+4m=2m-28+4m
We simplify the equation to the form, which is simple to understand
5m-7+4m=2m-28+4m
We move all terms containing m to the left and all other terms to the right.
+5m+4m-2m-4m=-28+7
We simplify left and right side of the equation.
+3m=-21
We divide both sides of the equation by 3 to get m.
m=-7
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