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Simplifying 7(3n + 6) = 189 Reorder the terms: 7(6 + 3n) = 189 (6 * 7 + 3n * 7) = 189 (42 + 21n) = 189 Solving 42 + 21n = 189 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 21n = 189 + -42 Combine like terms: 42 + -42 = 0 0 + 21n = 189 + -42 21n = 189 + -42 Combine like terms: 189 + -42 = 147 21n = 147 Divide each side by '21'. n = 7 Simplifying n = 7
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