20=b*4

Solution for 20=b*4 equation:

Simplifying
20 = b * 4

Reorder the terms for easier multiplication:
20 = 4b

Solving
20 = 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.
20 + -4b = 4b + -4b

Combine like terms: 4b + -4b = 0
20 + -4b = 0

Add '-20' to each side of the equation.
20 + -20 + -4b = 0 + -20

Combine like terms: 20 + -20 = 0
0 + -4b = 0 + -20
-4b = 0 + -20

Combine like terms: 0 + -20 = -20
-4b = -20

Divide each side by '-4'.
b = 5

Simplifying
b = 5