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Simplifying 3n + 15 = 42 Reorder the terms: 15 + 3n = 42 Solving 15 + 3n = 42 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 3n = 42 + -15 Combine like terms: 15 + -15 = 0 0 + 3n = 42 + -15 3n = 42 + -15 Combine like terms: 42 + -15 = 27 3n = 27 Divide each side by '3'. n = 9 Simplifying n = 9
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