3m+6m=21+12m

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Solution for 3m+6m=21+12m equation: 


Simplifying
3m + 6m = 21 + 12m

Combine like terms: 3m + 6m = 9m
9m = 21 + 12m

Solving
9m = 21 + 12m

Solving for variable 'm'.

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

Add '-12m' to each side of the equation.
9m + -12m = 21 + 12m + -12m

Combine like terms: 9m + -12m = -3m
-3m = 21 + 12m + -12m

Combine like terms: 12m + -12m = 0
-3m = 21 + 0
-3m = 21

Divide each side by '-3'.
m = -7

Simplifying
m = -7

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