42=8m+12m

Solution for 42=8m+12m equation:

Simplifying
42 = 8m + 12m

Combine like terms: 8m + 12m = 20m
42 = 20m

Solving
42 = 20m

Solving for variable 'm'.

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

Add '-20m' to each side of the equation.
42 + -20m = 20m + -20m

Combine like terms: 20m + -20m = 0
42 + -20m = 0

Add '-42' to each side of the equation.
42 + -42 + -20m = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -20m = 0 + -42
-20m = 0 + -42

Combine like terms: 0 + -42 = -42
-20m = -42

Divide each side by '-20'.
m = 2.1

Simplifying
m = 2.1