8b-91=b

Solution for 8b-91=b equation:

Simplifying
8b + -91 = b

Reorder the terms:
-91 + 8b = b

Solving
-91 + 8b = b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
-91 + 8b + -1b = b + -1b

Combine like terms: 8b + -1b = 7b
-91 + 7b = b + -1b

Combine like terms: b + -1b = 0
-91 + 7b = 0

Add '91' to each side of the equation.
-91 + 91 + 7b = 0 + 91

Combine like terms: -91 + 91 = 0
0 + 7b = 0 + 91
7b = 0 + 91

Combine like terms: 0 + 91 = 91
7b = 91

Divide each side by '7'.
b = 13

Simplifying
b = 13