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Simplifying 84 + -7x = 20x + 15 Reorder the terms: 84 + -7x = 15 + 20x Solving 84 + -7x = 15 + 20x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20x' to each side of the equation. 84 + -7x + -20x = 15 + 20x + -20x Combine like terms: -7x + -20x = -27x 84 + -27x = 15 + 20x + -20x Combine like terms: 20x + -20x = 0 84 + -27x = 15 + 0 84 + -27x = 15 Add '-84' to each side of the equation. 84 + -84 + -27x = 15 + -84 Combine like terms: 84 + -84 = 0 0 + -27x = 15 + -84 -27x = 15 + -84 Combine like terms: 15 + -84 = -69 -27x = -69 Divide each side by '-27'. x = 2.555555556 Simplifying x = 2.555555556
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