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Simplifying -4.5 = -3(b + 15) Reorder the terms: -4.5 = -3(15 + b) -4.5 = (15 * -3 + b * -3) -4.5 = (-45 + -3b) Solving -4.5 = -45 + -3b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '3b' to each side of the equation. -4.5 + 3b = -45 + -3b + 3b Combine like terms: -3b + 3b = 0 -4.5 + 3b = -45 + 0 -4.5 + 3b = -45 Add '4.5' to each side of the equation. -4.5 + 4.5 + 3b = -45 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + 3b = -45 + 4.5 3b = -45 + 4.5 Combine like terms: -45 + 4.5 = -40.5 3b = -40.5 Divide each side by '3'. b = -13.5 Simplifying b = -13.5
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