-5m-4m=21

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Solution for -5m-4m=21 equation: 


Simplifying
-5m + -4m = 21

Combine like terms: -5m + -4m = -9m
-9m = 21

Solving
-9m = 21

Solving for variable 'm'.

Move all terms containing m to the left, all other terms to the right.

Divide each side by '-9'.
m = -2.333333333

Simplifying
m = -2.333333333

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