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-2m+7=13
We simplify the equation to the form, which is simple to understand
-2m+7=13
We move all terms containing m to the left and all other terms to the right.
-2m=+13-7
We simplify left and right side of the equation.
-2m=+6
We divide both sides of the equation by -2 to get m.
m=-3
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