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Simplifying (x + 1) + (x + 2) = 40 Reorder the terms: (1 + x) + (x + 2) = 40 Remove parenthesis around (1 + x) 1 + x + (x + 2) = 40 Reorder the terms: 1 + x + (2 + x) = 40 Remove parenthesis around (2 + x) 1 + x + 2 + x = 40 Reorder the terms: 1 + 2 + x + x = 40 Combine like terms: 1 + 2 = 3 3 + x + x = 40 Combine like terms: x + x = 2x 3 + 2x = 40 Solving 3 + 2x = 40 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2x = 40 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 40 + -3 2x = 40 + -3 Combine like terms: 40 + -3 = 37 2x = 37 Divide each side by '2'. x = 18.5 Simplifying x = 18.5
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