39=3m-21

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Solution for 39=3m-21 equation:


Simplifying
39 = 3m + -21

Reorder the terms:
39 = -21 + 3m

Solving
39 = -21 + 3m

Solving for variable 'm'.

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

Add '-3m' to each side of the equation.
39 + -3m = -21 + 3m + -3m

Combine like terms: 3m + -3m = 0
39 + -3m = -21 + 0
39 + -3m = -21

Add '-39' to each side of the equation.
39 + -39 + -3m = -21 + -39

Combine like terms: 39 + -39 = 0
0 + -3m = -21 + -39
-3m = -21 + -39

Combine like terms: -21 + -39 = -60
-3m = -60

Divide each side by '-3'.
m = 20

Simplifying
m = 20

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