12m-9m=18

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Solution for 12m-9m=18 equation: 


Simplifying
12m + -9m = 18

Combine like terms: 12m + -9m = 3m
3m = 18

Solving
3m = 18

Solving for variable 'm'.

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

Divide each side by '3'.
m = 6

Simplifying
m = 6

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