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Simplifying 90 = -3n + 2(1 + -4n) 90 = -3n + (1 * 2 + -4n * 2) 90 = -3n + (2 + -8n) Reorder the terms: 90 = 2 + -3n + -8n Combine like terms: -3n + -8n = -11n 90 = 2 + -11n Solving 90 = 2 + -11n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '11n' to each side of the equation. 90 + 11n = 2 + -11n + 11n Combine like terms: -11n + 11n = 0 90 + 11n = 2 + 0 90 + 11n = 2 Add '-90' to each side of the equation. 90 + -90 + 11n = 2 + -90 Combine like terms: 90 + -90 = 0 0 + 11n = 2 + -90 11n = 2 + -90 Combine like terms: 2 + -90 = -88 11n = -88 Divide each side by '11'. n = -8 Simplifying n = -8
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