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Simplifying -3(7n + 1) = 18 Reorder the terms: -3(1 + 7n) = 18 (1 * -3 + 7n * -3) = 18 (-3 + -21n) = 18 Solving -3 + -21n = 18 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -21n = 18 + 3 Combine like terms: -3 + 3 = 0 0 + -21n = 18 + 3 -21n = 18 + 3 Combine like terms: 18 + 3 = 21 -21n = 21 Divide each side by '-21'. n = -1 Simplifying n = -1
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