13m=12m-21

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Solution for 13m=12m-21 equation: 


Simplifying
13m = 12m + -21

Reorder the terms:
13m = -21 + 12m

Solving
13m = -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.
13m + -12m = -21 + 12m + -12m

Combine like terms: 13m + -12m = 1m
1m = -21 + 12m + -12m

Combine like terms: 12m + -12m = 0
1m = -21 + 0
1m = -21

Divide each side by '1'.
m = -21

Simplifying
m = -21

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