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Simplifying x + (x + 31) = 180 Reorder the terms: x + (31 + x) = 180 Remove parenthesis around (31 + x) x + 31 + x = 180 Reorder the terms: 31 + x + x = 180 Combine like terms: x + x = 2x 31 + 2x = 180 Solving 31 + 2x = 180 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-31' to each side of the equation. 31 + -31 + 2x = 180 + -31 Combine like terms: 31 + -31 = 0 0 + 2x = 180 + -31 2x = 180 + -31 Combine like terms: 180 + -31 = 149 2x = 149 Divide each side by '2'. x = 74.5 Simplifying x = 74.5
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