42-m=8m+13m

Solution for 42-m=8m+13m equation:

Simplifying
42 + -1m = 8m + 13m

Combine like terms: 8m + 13m = 21m
42 + -1m = 21m

Solving
42 + -1m = 21m

Solving for variable 'm'.

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

Add '-21m' to each side of the equation.
42 + -1m + -21m = 21m + -21m

Combine like terms: -1m + -21m = -22m
42 + -22m = 21m + -21m

Combine like terms: 21m + -21m = 0
42 + -22m = 0

Add '-42' to each side of the equation.
42 + -42 + -22m = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -22m = 0 + -42
-22m = 0 + -42

Combine like terms: 0 + -42 = -42
-22m = -42

Divide each side by '-22'.
m = 1.909090909

Simplifying
m = 1.909090909