13m-21=9m-6

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Solution for 13m-21=9m-6 equation:


Simplifying
13m + -21 = 9m + -6

Reorder the terms:
-21 + 13m = 9m + -6

Reorder the terms:
-21 + 13m = -6 + 9m

Solving
-21 + 13m = -6 + 9m

Solving for variable 'm'.

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

Add '-9m' to each side of the equation.
-21 + 13m + -9m = -6 + 9m + -9m

Combine like terms: 13m + -9m = 4m
-21 + 4m = -6 + 9m + -9m

Combine like terms: 9m + -9m = 0
-21 + 4m = -6 + 0
-21 + 4m = -6

Add '21' to each side of the equation.
-21 + 21 + 4m = -6 + 21

Combine like terms: -21 + 21 = 0
0 + 4m = -6 + 21
4m = -6 + 21

Combine like terms: -6 + 21 = 15
4m = 15

Divide each side by '4'.
m = 3.75

Simplifying
m = 3.75

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