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Simplifying 7x + 2x + 50 = 140 Reorder the terms: 50 + 7x + 2x = 140 Combine like terms: 7x + 2x = 9x 50 + 9x = 140 Solving 50 + 9x = 140 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + 9x = 140 + -50 Combine like terms: 50 + -50 = 0 0 + 9x = 140 + -50 9x = 140 + -50 Combine like terms: 140 + -50 = 90 9x = 90 Divide each side by '9'. x = 10 Simplifying x = 10
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