-9m-13+13m=-21

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


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

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

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

Solving
-13 + 4m = -21

Solving for variable 'm'.

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

Add '13' to each side of the equation.
-13 + 13 + 4m = -21 + 13

Combine like terms: -13 + 13 = 0
0 + 4m = -21 + 13
4m = -21 + 13

Combine like terms: -21 + 13 = -8
4m = -8

Divide each side by '4'.
m = -2

Simplifying
m = -2

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