72=-4B

Solution for 72=-4B equation:

Simplifying
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