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Simplifying x + 3x + 30 + 3x = 500 Reorder the terms: 30 + x + 3x + 3x = 500 Combine like terms: x + 3x = 4x 30 + 4x + 3x = 500 Combine like terms: 4x + 3x = 7x 30 + 7x = 500 Solving 30 + 7x = 500 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30' to each side of the equation. 30 + -30 + 7x = 500 + -30 Combine like terms: 30 + -30 = 0 0 + 7x = 500 + -30 7x = 500 + -30 Combine like terms: 500 + -30 = 470 7x = 470 Divide each side by '7'. x = 67.14285714 Simplifying x = 67.14285714
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