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Simplifying x + 2x + 1 + 3x + 2 = 126 Reorder the terms: 1 + 2 + x + 2x + 3x = 126 Combine like terms: 1 + 2 = 3 3 + x + 2x + 3x = 126 Combine like terms: x + 2x = 3x 3 + 3x + 3x = 126 Combine like terms: 3x + 3x = 6x 3 + 6x = 126 Solving 3 + 6x = 126 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 + 6x = 126 + -3 Combine like terms: 3 + -3 = 0 0 + 6x = 126 + -3 6x = 126 + -3 Combine like terms: 126 + -3 = 123 6x = 123 Divide each side by '6'. x = 20.5 Simplifying x = 20.5
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