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Simplifying -21 + -4n = 7 + -8n Solving -21 + -4n = 7 + -8n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '8n' to each side of the equation. -21 + -4n + 8n = 7 + -8n + 8n Combine like terms: -4n + 8n = 4n -21 + 4n = 7 + -8n + 8n Combine like terms: -8n + 8n = 0 -21 + 4n = 7 + 0 -21 + 4n = 7 Add '21' to each side of the equation. -21 + 21 + 4n = 7 + 21 Combine like terms: -21 + 21 = 0 0 + 4n = 7 + 21 4n = 7 + 21 Combine like terms: 7 + 21 = 28 4n = 28 Divide each side by '4'. n = 7 Simplifying n = 7
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