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Simplifying 9n + -2(2n + -1) = 15 Reorder the terms: 9n + -2(-1 + 2n) = 15 9n + (-1 * -2 + 2n * -2) = 15 9n + (2 + -4n) = 15 Reorder the terms: 2 + 9n + -4n = 15 Combine like terms: 9n + -4n = 5n 2 + 5n = 15 Solving 2 + 5n = 15 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 5n = 15 + -2 Combine like terms: 2 + -2 = 0 0 + 5n = 15 + -2 5n = 15 + -2 Combine like terms: 15 + -2 = 13 5n = 13 Divide each side by '5'. n = 2.6 Simplifying n = 2.6
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