42=8m+b

Solution for 42=8m+b equation:

Simplifying
42 = 8m + b

Reorder the terms:
42 = b + 8m

Solving
42 = b + 8m

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
42 + -1b = b + -1b + 8m

Combine like terms: b + -1b = 0
42 + -1b = 0 + 8m
42 + -1b = 8m

Add '-42' to each side of the equation.
42 + -42 + -1b = -42 + 8m

Combine like terms: 42 + -42 = 0
0 + -1b = -42 + 8m
-1b = -42 + 8m

Divide each side by '-1'.
b = 42 + -8m

Simplifying
b = 42 + -8m