15b+90-9b+b=0

Solution for 15b+90-9b+b=0 equation:

Simplifying
15b + 90 + -9b + b = 0

Reorder the terms:
90 + 15b + -9b + b = 0

Combine like terms: 15b + -9b = 6b
90 + 6b + b = 0

Combine like terms: 6b + b = 7b
90 + 7b = 0

Solving
90 + 7b = 0

Solving for variable 'b'.

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

Add '-90' to each side of the equation.
90 + -90 + 7b = 0 + -90

Combine like terms: 90 + -90 = 0
0 + 7b = 0 + -90
7b = 0 + -90

Combine like terms: 0 + -90 = -90
7b = -90

Divide each side by '7'.
b = -12.85714286

Simplifying
b = -12.85714286