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m+(-31)=-12
We simplify the equation to the form, which is simple to understand
m+(-31)=-12
Remove unnecessary parentheses
+m-31=-12
We move all terms containing m to the left and all other terms to the right.
+1m=-12+31
We simplify left and right side of the equation.
+1m=+19
We divide both sides of the equation by 1 to get m.
m=19
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