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Simplifying 3(x + 5) = 90 Reorder the terms: 3(5 + x) = 90 (5 * 3 + x * 3) = 90 (15 + 3x) = 90 Solving 15 + 3x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 3x = 90 + -15 Combine like terms: 15 + -15 = 0 0 + 3x = 90 + -15 3x = 90 + -15 Combine like terms: 90 + -15 = 75 3x = 75 Divide each side by '3'. x = 25 Simplifying x = 25

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