42+3b=-4b

Solution for 42+3b=-4b equation:

Simplifying
42 + 3b = -4b

Solving
42 + 3b = -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 + 3b + 4b = -4b + 4b

Combine like terms: 3b + 4b = 7b
42 + 7b = -4b + 4b

Combine like terms: -4b + 4b = 0
42 + 7b = 0

Add '-42' to each side of the equation.
42 + -42 + 7b = 0 + -42

Combine like terms: 42 + -42 = 0
0 + 7b = 0 + -42
7b = 0 + -42

Combine like terms: 0 + -42 = -42
7b = -42

Divide each side by '7'.
b = -6

Simplifying
b = -6