4m+21=12+m

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Solution for 4m+21=12+m equation:


Simplifying
4m + 21 = 12 + m

Reorder the terms:
21 + 4m = 12 + m

Solving
21 + 4m = 12 + m

Solving for variable 'm'.

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

Add '-1m' to each side of the equation.
21 + 4m + -1m = 12 + m + -1m

Combine like terms: 4m + -1m = 3m
21 + 3m = 12 + m + -1m

Combine like terms: m + -1m = 0
21 + 3m = 12 + 0
21 + 3m = 12

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

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

Combine like terms: 12 + -21 = -9
3m = -9

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

Simplifying
m = -3

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