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Simplifying 8n + -3n + -4 + 5 = 21 Reorder the terms: -4 + 5 + 8n + -3n = 21 Combine like terms: -4 + 5 = 1 1 + 8n + -3n = 21 Combine like terms: 8n + -3n = 5n 1 + 5n = 21 Solving 1 + 5n = 21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 5n = 21 + -1 Combine like terms: 1 + -1 = 0 0 + 5n = 21 + -1 5n = 21 + -1 Combine like terms: 21 + -1 = 20 5n = 20 Divide each side by '5'. n = 4 Simplifying n = 4
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