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Simplifying -21 + -8n = -4(9n + 5) Reorder the terms: -21 + -8n = -4(5 + 9n) -21 + -8n = (5 * -4 + 9n * -4) -21 + -8n = (-20 + -36n) Solving -21 + -8n = -20 + -36n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '36n' to each side of the equation. -21 + -8n + 36n = -20 + -36n + 36n Combine like terms: -8n + 36n = 28n -21 + 28n = -20 + -36n + 36n Combine like terms: -36n + 36n = 0 -21 + 28n = -20 + 0 -21 + 28n = -20 Add '21' to each side of the equation. -21 + 21 + 28n = -20 + 21 Combine like terms: -21 + 21 = 0 0 + 28n = -20 + 21 28n = -20 + 21 Combine like terms: -20 + 21 = 1 28n = 1 Divide each side by '28'. n = 0.03571428571 Simplifying n = 0.03571428571
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