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21=-7(m+2)
We simplify the equation to the form, which is simple to understand
21=-7(m+2)
Reorder the terms in parentheses
21=+(-7m-14)
Remove unnecessary parentheses
+21=-7m-14
We move all terms containing m to the left and all other terms to the right.
+7m=-14-21
We simplify left and right side of the equation.
+7m=-35
We divide both sides of the equation by 07 to get m.
m=-5
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