-2m--5m=21

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Solution for -2m--5m=21 equation:


-2m--5m=21

We simplify the equation to the form, which is simple to understand 
-2m+5m=21

We move all terms containing m to the left and all other terms to the right. 
-2m+5m=+21

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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