(-13m)+21=(-9m)-7

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Solution for (-13m)+21=(-9m)-7 equation:


(-13m)+21=(-9m)-7

We simplify the equation to the form, which is simple to understand 
(-13m)+21=(-9m)-7

Remove unnecessary parentheses
-13m+21=(-9m)-7

Remove unnecessary parentheses
-13m+21=-9m-7

We move all terms containing m to the left and all other terms to the right. 
-13m+9m=-7-21

We simplify left and right side of the equation. 
-4m=-28

We divide both sides of the equation by -4 to get m. 
m=7

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