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Simplifying 2x + (x + -15) = 180 Reorder the terms: 2x + (-15 + x) = 180 Remove parenthesis around (-15 + x) 2x + -15 + x = 180 Reorder the terms: -15 + 2x + x = 180 Combine like terms: 2x + x = 3x -15 + 3x = 180 Solving -15 + 3x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + 3x = 180 + 15 Combine like terms: -15 + 15 = 0 0 + 3x = 180 + 15 3x = 180 + 15 Combine like terms: 180 + 15 = 195 3x = 195 Divide each side by '3'. x = 65 Simplifying x = 65
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