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Simplifying X + (1 + X) + (X + 2) = 143 Remove parenthesis around (1 + X) X + 1 + X + (X + 2) = 143 Reorder the terms: X + 1 + X + (2 + X) = 143 Remove parenthesis around (2 + X) X + 1 + X + 2 + X = 143 Reorder the terms: 1 + 2 + X + X + X = 143 Combine like terms: 1 + 2 = 3 3 + X + X + X = 143 Combine like terms: X + X = 2X 3 + 2X + X = 143 Combine like terms: 2X + X = 3X 3 + 3X = 143 Solving 3 + 3X = 143 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 + 3X = 143 + -3 Combine like terms: 3 + -3 = 0 0 + 3X = 143 + -3 3X = 143 + -3 Combine like terms: 143 + -3 = 140 3X = 140 Divide each side by '3'. X = 46.66666667 Simplifying X = 46.66666667
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