72=b*4

Solution for 72=b*4 equation:

Simplifying
72 = b * 4

Reorder the terms for easier multiplication:
72 = 4b

Solving
72 = 4b

Solving for variable 'b'.

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

Add '-4b' to each side of the equation.
72 + -4b = 4b + -4b

Combine like terms: 4b + -4b = 0
72 + -4b = 0

Add '-72' to each side of the equation.
72 + -72 + -4b = 0 + -72

Combine like terms: 72 + -72 = 0
0 + -4b = 0 + -72
-4b = 0 + -72

Combine like terms: 0 + -72 = -72
-4b = -72

Divide each side by '-4'.
b = 18

Simplifying
b = 18