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Simplifying 3 + 7n + 2 = 21 Reorder the terms: 3 + 2 + 7n = 21 Combine like terms: 3 + 2 = 5 5 + 7n = 21 Solving 5 + 7n = 21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + 7n = 21 + -5 Combine like terms: 5 + -5 = 0 0 + 7n = 21 + -5 7n = 21 + -5 Combine like terms: 21 + -5 = 16 7n = 16 Divide each side by '7'. n = 2.285714286 Simplifying n = 2.285714286
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