-42=4b

Solution for -42=4b equation:

Simplifying
-42 = 4b

Solving
-42 = 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
-42 + -4b = 4b + -4b

Combine like terms: 4b + -4b = 0
-42 + -4b = 0

Add '42' to each side of the equation.
-42 + 42 + -4b = 0 + 42

Combine like terms: -42 + 42 = 0
0 + -4b = 0 + 42
-4b = 0 + 42

Combine like terms: 0 + 42 = 42
-4b = 42

Divide each side by '-4'.
b = -10.5

Simplifying
b = -10.5