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Simplifying 9n + 21 = 51 Reorder the terms: 21 + 9n = 51 Solving 21 + 9n = 51 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 9n = 51 + -21 Combine like terms: 21 + -21 = 0 0 + 9n = 51 + -21 9n = 51 + -21 Combine like terms: 51 + -21 = 30 9n = 30 Divide each side by '9'. n = 3.333333333 Simplifying n = 3.333333333
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