39=-m+5m-7m

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Solution for 39=-m+5m-7m equation:


Simplifying
39 = -1m + 5m + -7m

Combine like terms: -1m + 5m = 4m
39 = 4m + -7m

Combine like terms: 4m + -7m = -3m
39 = -3m

Solving
39 = -3m

Solving for variable 'm'.

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

Add '3m' to each side of the equation.
39 + 3m = -3m + 3m

Combine like terms: -3m + 3m = 0
39 + 3m = 0

Add '-39' to each side of the equation.
39 + -39 + 3m = 0 + -39

Combine like terms: 39 + -39 = 0
0 + 3m = 0 + -39
3m = 0 + -39

Combine like terms: 0 + -39 = -39
3m = -39

Divide each side by '3'.
m = -13

Simplifying
m = -13

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