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Simplifying 8n + -1(5n + 4) = 20 Reorder the terms: 8n + -1(4 + 5n) = 20 8n + (4 * -1 + 5n * -1) = 20 8n + (-4 + -5n) = 20 Reorder the terms: -4 + 8n + -5n = 20 Combine like terms: 8n + -5n = 3n -4 + 3n = 20 Solving -4 + 3n = 20 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 3n = 20 + 4 Combine like terms: -4 + 4 = 0 0 + 3n = 20 + 4 3n = 20 + 4 Combine like terms: 20 + 4 = 24 3n = 24 Divide each side by '3'. n = 8 Simplifying n = 8
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