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Simplifying X + (X + 2) + (X + 4) = 126 Reorder the terms: X + (2 + X) + (X + 4) = 126 Remove parenthesis around (2 + X) X + 2 + X + (X + 4) = 126 Reorder the terms: X + 2 + X + (4 + X) = 126 Remove parenthesis around (4 + X) X + 2 + X + 4 + X = 126 Reorder the terms: 2 + 4 + X + X + X = 126 Combine like terms: 2 + 4 = 6 6 + X + X + X = 126 Combine like terms: X + X = 2X 6 + 2X + X = 126 Combine like terms: 2X + X = 3X 6 + 3X = 126 Solving 6 + 3X = 126 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 3X = 126 + -6 Combine like terms: 6 + -6 = 0 0 + 3X = 126 + -6 3X = 126 + -6 Combine like terms: 126 + -6 = 120 3X = 120 Divide each side by '3'. X = 40 Simplifying X = 40
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