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Simplifying 39(2x + 10) = 405 Reorder the terms: 39(10 + 2x) = 405 (10 * 39 + 2x * 39) = 405 (390 + 78x) = 405 Solving 390 + 78x = 405 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-390' to each side of the equation. 390 + -390 + 78x = 405 + -390 Combine like terms: 390 + -390 = 0 0 + 78x = 405 + -390 78x = 405 + -390 Combine like terms: 405 + -390 = 15 78x = 15 Divide each side by '78'. x = 0.1923076923 Simplifying x = 0.1923076923
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