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Simplifying 4(5x + 7) + -8 = 80 Reorder the terms: 4(7 + 5x) + -8 = 80 (7 * 4 + 5x * 4) + -8 = 80 (28 + 20x) + -8 = 80 Reorder the terms: 28 + -8 + 20x = 80 Combine like terms: 28 + -8 = 20 20 + 20x = 80 Solving 20 + 20x = 80 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + 20x = 80 + -20 Combine like terms: 20 + -20 = 0 0 + 20x = 80 + -20 20x = 80 + -20 Combine like terms: 80 + -20 = 60 20x = 60 Divide each side by '20'. x = 3 Simplifying x = 3
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