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Simplifying 3n = 2(20 + -1n) 3n = (20 * 2 + -1n * 2) 3n = (40 + -2n) Solving 3n = 40 + -2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2n' to each side of the equation. 3n + 2n = 40 + -2n + 2n Combine like terms: 3n + 2n = 5n 5n = 40 + -2n + 2n Combine like terms: -2n + 2n = 0 5n = 40 + 0 5n = 40 Divide each side by '5'. n = 8 Simplifying n = 8
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