-3(b+9)=-b

Solution for -3(b+9)=-b equation:

Simplifying
-3(b + 9) = -1b

Reorder the terms:
-3(9 + b) = -1b
(9 * -3 + b * -3) = -1b
(-27 + -3b) = -1b

Solving
-27 + -3b = -1b

Solving for variable 'b'.

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

Add 'b' to each side of the equation.
-27 + -3b + b = -1b + b

Combine like terms: -3b + b = -2b
-27 + -2b = -1b + b

Combine like terms: -1b + b = 0
-27 + -2b = 0

Add '27' to each side of the equation.
-27 + 27 + -2b = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -2b = 0 + 27
-2b = 0 + 27

Combine like terms: 0 + 27 = 27
-2b = 27

Divide each side by '-2'.
b = -13.5

Simplifying
b = -13.5