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Simplifying (3x + -5) + (x + -5) + (x + -20) = 180 Reorder the terms: (-5 + 3x) + (x + -5) + (x + -20) = 180 Remove parenthesis around (-5 + 3x) -5 + 3x + (x + -5) + (x + -20) = 180 Reorder the terms: -5 + 3x + (-5 + x) + (x + -20) = 180 Remove parenthesis around (-5 + x) -5 + 3x + -5 + x + (x + -20) = 180 Reorder the terms: -5 + 3x + -5 + x + (-20 + x) = 180 Remove parenthesis around (-20 + x) -5 + 3x + -5 + x + -20 + x = 180 Reorder the terms: -5 + -5 + -20 + 3x + x + x = 180 Combine like terms: -5 + -5 = -10 -10 + -20 + 3x + x + x = 180 Combine like terms: -10 + -20 = -30 -30 + 3x + x + x = 180 Combine like terms: 3x + x = 4x -30 + 4x + x = 180 Combine like terms: 4x + x = 5x -30 + 5x = 180 Solving -30 + 5x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + 5x = 180 + 30 Combine like terms: -30 + 30 = 0 0 + 5x = 180 + 30 5x = 180 + 30 Combine like terms: 180 + 30 = 210 5x = 210 Divide each side by '5'. x = 42 Simplifying x = 42
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