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Simplifying 123 = 5x + 72 + 2x + -3 Reorder the terms: 123 = 72 + -3 + 5x + 2x Combine like terms: 72 + -3 = 69 123 = 69 + 5x + 2x Combine like terms: 5x + 2x = 7x 123 = 69 + 7x Solving 123 = 69 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 123 + -7x = 69 + 7x + -7x Combine like terms: 7x + -7x = 0 123 + -7x = 69 + 0 123 + -7x = 69 Add '-123' to each side of the equation. 123 + -123 + -7x = 69 + -123 Combine like terms: 123 + -123 = 0 0 + -7x = 69 + -123 -7x = 69 + -123 Combine like terms: 69 + -123 = -54 -7x = -54 Divide each side by '-7'. x = 7.714285714 Simplifying x = 7.714285714
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