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Simplifying (x + 81) + (x + 121) = 180 Reorder the terms: (81 + x) + (x + 121) = 180 Remove parenthesis around (81 + x) 81 + x + (x + 121) = 180 Reorder the terms: 81 + x + (121 + x) = 180 Remove parenthesis around (121 + x) 81 + x + 121 + x = 180 Reorder the terms: 81 + 121 + x + x = 180 Combine like terms: 81 + 121 = 202 202 + x + x = 180 Combine like terms: x + x = 2x 202 + 2x = 180 Solving 202 + 2x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-202' to each side of the equation. 202 + -202 + 2x = 180 + -202 Combine like terms: 202 + -202 = 0 0 + 2x = 180 + -202 2x = 180 + -202 Combine like terms: 180 + -202 = -22 2x = -22 Divide each side by '2'. x = -11 Simplifying x = -11
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