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Simplifying (3x + 5) + (5x + 15) + (9x + -20) = 180 Reorder the terms: (5 + 3x) + (5x + 15) + (9x + -20) = 180 Remove parenthesis around (5 + 3x) 5 + 3x + (5x + 15) + (9x + -20) = 180 Reorder the terms: 5 + 3x + (15 + 5x) + (9x + -20) = 180 Remove parenthesis around (15 + 5x) 5 + 3x + 15 + 5x + (9x + -20) = 180 Reorder the terms: 5 + 3x + 15 + 5x + (-20 + 9x) = 180 Remove parenthesis around (-20 + 9x) 5 + 3x + 15 + 5x + -20 + 9x = 180 Reorder the terms: 5 + 15 + -20 + 3x + 5x + 9x = 180 Combine like terms: 5 + 15 = 20 20 + -20 + 3x + 5x + 9x = 180 Combine like terms: 20 + -20 = 0 0 + 3x + 5x + 9x = 180 3x + 5x + 9x = 180 Combine like terms: 3x + 5x = 8x 8x + 9x = 180 Combine like terms: 8x + 9x = 17x 17x = 180 Solving 17x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Divide each side by '17'. x = 10.58823529 Simplifying x = 10.58823529
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