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Simplifying 7(-4n + 20) = -20n + -20 Reorder the terms: 7(20 + -4n) = -20n + -20 (20 * 7 + -4n * 7) = -20n + -20 (140 + -28n) = -20n + -20 Reorder the terms: 140 + -28n = -20 + -20n Solving 140 + -28n = -20 + -20n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '20n' to each side of the equation. 140 + -28n + 20n = -20 + -20n + 20n Combine like terms: -28n + 20n = -8n 140 + -8n = -20 + -20n + 20n Combine like terms: -20n + 20n = 0 140 + -8n = -20 + 0 140 + -8n = -20 Add '-140' to each side of the equation. 140 + -140 + -8n = -20 + -140 Combine like terms: 140 + -140 = 0 0 + -8n = -20 + -140 -8n = -20 + -140 Combine like terms: -20 + -140 = -160 -8n = -160 Divide each side by '-8'. n = 20 Simplifying n = 20
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