3m-12=21

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Solution for 3m-12=21 equation: 


Simplifying
3m + -12 = 21

Reorder the terms:
-12 + 3m = 21

Solving
-12 + 3m = 21

Solving for variable 'm'.

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

Add '12' to each side of the equation.
-12 + 12 + 3m = 21 + 12

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

Combine like terms: 21 + 12 = 33
3m = 33

Divide each side by '3'.
m = 11

Simplifying
m = 11

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