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Simplifying x + 2x + 3 + 4x = 42 Reorder the terms: 3 + x + 2x + 4x = 42 Combine like terms: x + 2x = 3x 3 + 3x + 4x = 42 Combine like terms: 3x + 4x = 7x 3 + 7x = 42 Solving 3 + 7x = 42 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 + 7x = 42 + -3 Combine like terms: 3 + -3 = 0 0 + 7x = 42 + -3 7x = 42 + -3 Combine like terms: 42 + -3 = 39 7x = 39 Divide each side by '7'. x = 5.571428571 Simplifying x = 5.571428571
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