13-3m=15

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Solution for 13-3m=15 equation: 


Simplifying
13 + -3m = 15

Solving
13 + -3m = 15

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 + -3m = 15 + -13

Combine like terms: 13 + -13 = 0
0 + -3m = 15 + -13
-3m = 15 + -13

Combine like terms: 15 + -13 = 2
-3m = 2

Divide each side by '-3'.
m = -0.6666666667

Simplifying
m = -0.6666666667

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