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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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