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Simplifying 8n + -1(2n + -3) = 21 Reorder the terms: 8n + -1(-3 + 2n) = 21 8n + (-3 * -1 + 2n * -1) = 21 8n + (3 + -2n) = 21 Reorder the terms: 3 + 8n + -2n = 21 Combine like terms: 8n + -2n = 6n 3 + 6n = 21 Solving 3 + 6n = 21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 6n = 21 + -3 Combine like terms: 3 + -3 = 0 0 + 6n = 21 + -3 6n = 21 + -3 Combine like terms: 21 + -3 = 18 6n = 18 Divide each side by '6'. n = 3 Simplifying n = 3
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