21-7m=

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Solution for 21-7m= equation: 


Simplifying
21 + -7m = 0

Solving
21 + -7m = 0

Solving for variable 'm'.

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

Add '-21' to each side of the equation.
21 + -21 + -7m = 0 + -21

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

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

Divide each side by '-7'.
m = 3

Simplifying
m = 3

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