-72=8b

Solution for -72=8b equation:

Simplifying
-72 = 8b

Solving
-72 = 8b

Solving for variable 'b'.

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

Add '-8b' to each side of the equation.
-72 + -8b = 8b + -8b

Combine like terms: 8b + -8b = 0
-72 + -8b = 0

Add '72' to each side of the equation.
-72 + 72 + -8b = 0 + 72

Combine like terms: -72 + 72 = 0
0 + -8b = 0 + 72
-8b = 0 + 72

Combine like terms: 0 + 72 = 72
-8b = 72

Divide each side by '-8'.
b = -9

Simplifying
b = -9