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Simplifying -9n + 8 = -21n Reorder the terms: 8 + -9n = -21n Solving 8 + -9n = -21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '21n' to each side of the equation. 8 + -9n + 21n = -21n + 21n Combine like terms: -9n + 21n = 12n 8 + 12n = -21n + 21n Combine like terms: -21n + 21n = 0 8 + 12n = 0 Add '-8' to each side of the equation. 8 + -8 + 12n = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 12n = 0 + -8 12n = 0 + -8 Combine like terms: 0 + -8 = -8 12n = -8 Divide each side by '12'. n = -0.6666666667 Simplifying n = -0.6666666667
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