6=3+-3b

Solution for 6=3+-3b equation:

Simplifying
6 = 3 + -3b

Solving
6 = 3 + -3b

Solving for variable 'b'.

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

Add '3b' to each side of the equation.
6 + 3b = 3 + -3b + 3b

Combine like terms: -3b + 3b = 0
6 + 3b = 3 + 0
6 + 3b = 3

Add '-6' to each side of the equation.
6 + -6 + 3b = 3 + -6

Combine like terms: 6 + -6 = 0
0 + 3b = 3 + -6
3b = 3 + -6

Combine like terms: 3 + -6 = -3
3b = -3

Divide each side by '3'.
b = -1

Simplifying
b = -1