3m-7m+13=21

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Solution for 3m-7m+13=21 equation:


Simplifying
3m + -7m + 13 = 21

Reorder the terms:
13 + 3m + -7m = 21

Combine like terms: 3m + -7m = -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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