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Simplifying -8n + 21 = n Reorder the terms: 21 + -8n = n Solving 21 + -8n = n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. 21 + -8n + -1n = n + -1n Combine like terms: -8n + -1n = -9n 21 + -9n = n + -1n Combine like terms: n + -1n = 0 21 + -9n = 0 Add '-21' to each side of the equation. 21 + -21 + -9n = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -9n = 0 + -21 -9n = 0 + -21 Combine like terms: 0 + -21 = -21 -9n = -21 Divide each side by '-9'. n = 2.333333333 Simplifying n = 2.333333333
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