81=-3(5-8b)

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Solution for 81=-3(5-8b) equation:


Simplifying
81 = -3(5 + -8b)
81 = (5 * -3 + -8b * -3)
81 = (-15 + 24b)

Solving
81 = -15 + 24b

Solving for variable 'b'.

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

Add '-24b' to each side of the equation.
81 + -24b = -15 + 24b + -24b

Combine like terms: 24b + -24b = 0
81 + -24b = -15 + 0
81 + -24b = -15

Add '-81' to each side of the equation.
81 + -81 + -24b = -15 + -81

Combine like terms: 81 + -81 = 0
0 + -24b = -15 + -81
-24b = -15 + -81

Combine like terms: -15 + -81 = -96
-24b = -96

Divide each side by '-24'.
b = 4

Simplifying
b = 4

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