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Simplifying x + (2x + -12) + 42 = 180 Reorder the terms: x + (-12 + 2x) + 42 = 180 Remove parenthesis around (-12 + 2x) x + -12 + 2x + 42 = 180 Reorder the terms: -12 + 42 + x + 2x = 180 Combine like terms: -12 + 42 = 30 30 + x + 2x = 180 Combine like terms: x + 2x = 3x 30 + 3x = 180 Solving 30 + 3x = 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 + 3x = 180 + -30 Combine like terms: 30 + -30 = 0 0 + 3x = 180 + -30 3x = 180 + -30 Combine like terms: 180 + -30 = 150 3x = 150 Divide each side by '3'. x = 50 Simplifying x = 50
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