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Simplifying (9x + -2) + (20x + 5) + 40 = 180 Reorder the terms: (-2 + 9x) + (20x + 5) + 40 = 180 Remove parenthesis around (-2 + 9x) -2 + 9x + (20x + 5) + 40 = 180 Reorder the terms: -2 + 9x + (5 + 20x) + 40 = 180 Remove parenthesis around (5 + 20x) -2 + 9x + 5 + 20x + 40 = 180 Reorder the terms: -2 + 5 + 40 + 9x + 20x = 180 Combine like terms: -2 + 5 = 3 3 + 40 + 9x + 20x = 180 Combine like terms: 3 + 40 = 43 43 + 9x + 20x = 180 Combine like terms: 9x + 20x = 29x 43 + 29x = 180 Solving 43 + 29x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-43' to each side of the equation. 43 + -43 + 29x = 180 + -43 Combine like terms: 43 + -43 = 0 0 + 29x = 180 + -43 29x = 180 + -43 Combine like terms: 180 + -43 = 137 29x = 137 Divide each side by '29'. x = 4.724137931 Simplifying x = 4.724137931
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