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Simplifying 2(x + 15) + 15 = 87 Reorder the terms: 2(15 + x) + 15 = 87 (15 * 2 + x * 2) + 15 = 87 (30 + 2x) + 15 = 87 Reorder the terms: 30 + 15 + 2x = 87 Combine like terms: 30 + 15 = 45 45 + 2x = 87 Solving 45 + 2x = 87 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-45' to each side of the equation. 45 + -45 + 2x = 87 + -45 Combine like terms: 45 + -45 = 0 0 + 2x = 87 + -45 2x = 87 + -45 Combine like terms: 87 + -45 = 42 2x = 42 Divide each side by '2'. x = 21 Simplifying x = 21
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