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Simplifying 20x + 7(x + 20) = 840 Reorder the terms: 20x + 7(20 + x) = 840 20x + (20 * 7 + x * 7) = 840 20x + (140 + 7x) = 840 Reorder the terms: 140 + 20x + 7x = 840 Combine like terms: 20x + 7x = 27x 140 + 27x = 840 Solving 140 + 27x = 840 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-140' to each side of the equation. 140 + -140 + 27x = 840 + -140 Combine like terms: 140 + -140 = 0 0 + 27x = 840 + -140 27x = 840 + -140 Combine like terms: 840 + -140 = 700 27x = 700 Divide each side by '27'. x = 25.92592593 Simplifying x = 25.92592593
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