5m-21=2m

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Solution for 5m-21=2m equation:


Simplifying
5m + -21 = 2m

Reorder the terms:
-21 + 5m = 2m

Solving
-21 + 5m = 2m

Solving for variable 'm'.

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

Add '-2m' to each side of the equation.
-21 + 5m + -2m = 2m + -2m

Combine like terms: 5m + -2m = 3m
-21 + 3m = 2m + -2m

Combine like terms: 2m + -2m = 0
-21 + 3m = 0

Add '21' to each side of the equation.
-21 + 21 + 3m = 0 + 21

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

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

Divide each side by '3'.
m = 7

Simplifying
m = 7

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