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Simplifying n + 900 + n = 1000 Reorder the terms: 900 + n + n = 1000 Combine like terms: n + n = 2n 900 + 2n = 1000 Solving 900 + 2n = 1000 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-900' to each side of the equation. 900 + -900 + 2n = 1000 + -900 Combine like terms: 900 + -900 = 0 0 + 2n = 1000 + -900 2n = 1000 + -900 Combine like terms: 1000 + -900 = 100 2n = 100 Divide each side by '2'. n = 50 Simplifying n = 50
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