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Simplifying 20 = 6(1 + -1n) + -2(1 + n) 20 = (1 * 6 + -1n * 6) + -2(1 + n) 20 = (6 + -6n) + -2(1 + n) 20 = 6 + -6n + (1 * -2 + n * -2) 20 = 6 + -6n + (-2 + -2n) Reorder the terms: 20 = 6 + -2 + -6n + -2n Combine like terms: 6 + -2 = 4 20 = 4 + -6n + -2n Combine like terms: -6n + -2n = -8n 20 = 4 + -8n Solving 20 = 4 + -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. 20 + 8n = 4 + -8n + 8n Combine like terms: -8n + 8n = 0 20 + 8n = 4 + 0 20 + 8n = 4 Add '-20' to each side of the equation. 20 + -20 + 8n = 4 + -20 Combine like terms: 20 + -20 = 0 0 + 8n = 4 + -20 8n = 4 + -20 Combine like terms: 4 + -20 = -16 8n = -16 Divide each side by '8'. n = -2 Simplifying n = -2
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