72=-3(5b-4)

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Solution for 72=-3(5b-4) equation:


Simplifying
72 = -3(5b + -4)

Reorder the terms:
72 = -3(-4 + 5b)
72 = (-4 * -3 + 5b * -3)
72 = (12 + -15b)

Solving
72 = 12 + -15b

Solving for variable 'b'.

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

Add '15b' to each side of the equation.
72 + 15b = 12 + -15b + 15b

Combine like terms: -15b + 15b = 0
72 + 15b = 12 + 0
72 + 15b = 12

Add '-72' to each side of the equation.
72 + -72 + 15b = 12 + -72

Combine like terms: 72 + -72 = 0
0 + 15b = 12 + -72
15b = 12 + -72

Combine like terms: 12 + -72 = -60
15b = -60

Divide each side by '15'.
b = -4

Simplifying
b = -4

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