5m-21=7+m

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Solution for 5m-21=7+m equation:


Simplifying
5m + -21 = 7 + m

Reorder the terms:
-21 + 5m = 7 + m

Solving
-21 + 5m = 7 + 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 + 5m + -1m = 7 + m + -1m

Combine like terms: 5m + -1m = 4m
-21 + 4m = 7 + m + -1m

Combine like terms: m + -1m = 0
-21 + 4m = 7 + 0
-21 + 4m = 7

Add '21' to each side of the equation.
-21 + 21 + 4m = 7 + 21

Combine like terms: -21 + 21 = 0
0 + 4m = 7 + 21
4m = 7 + 21

Combine like terms: 7 + 21 = 28
4m = 28

Divide each side by '4'.
m = 7

Simplifying
m = 7

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