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Simplifying -21 = 5n + -3 + -8n Reorder the terms: -21 = -3 + 5n + -8n Combine like terms: 5n + -8n = -3n -21 = -3 + -3n Solving -21 = -3 + -3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3n' to each side of the equation. -21 + 3n = -3 + -3n + 3n Combine like terms: -3n + 3n = 0 -21 + 3n = -3 + 0 -21 + 3n = -3 Add '21' to each side of the equation. -21 + 21 + 3n = -3 + 21 Combine like terms: -21 + 21 = 0 0 + 3n = -3 + 21 3n = -3 + 21 Combine like terms: -3 + 21 = 18 3n = 18 Divide each side by '3'. n = 6 Simplifying n = 6
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