21=12m-15

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Solution for 21=12m-15 equation:


Simplifying
21 = 12m + -15

Reorder the terms:
21 = -15 + 12m

Solving
21 = -15 + 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.
21 + -12m = -15 + 12m + -12m

Combine like terms: 12m + -12m = 0
21 + -12m = -15 + 0
21 + -12m = -15

Add '-21' to each side of the equation.
21 + -21 + -12m = -15 + -21

Combine like terms: 21 + -21 = 0
0 + -12m = -15 + -21
-12m = -15 + -21

Combine like terms: -15 + -21 = -36
-12m = -36

Divide each side by '-12'.
m = 3

Simplifying
m = 3

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