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Simplifying 3n + 2(20 + -1n) = 49 3n + (20 * 2 + -1n * 2) = 49 3n + (40 + -2n) = 49 Reorder the terms: 40 + 3n + -2n = 49 Combine like terms: 3n + -2n = 1n 40 + 1n = 49 Solving 40 + 1n = 49 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + 1n = 49 + -40 Combine like terms: 40 + -40 = 0 0 + 1n = 49 + -40 1n = 49 + -40 Combine like terms: 49 + -40 = 9 1n = 9 Divide each side by '1'. n = 9 Simplifying n = 9
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