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Simplifying 7(3 + -1n) = 0 (3 * 7 + -1n * 7) = 0 (21 + -7n) = 0 Solving 21 + -7n = 0 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 + -7n = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -7n = 0 + -21 -7n = 0 + -21 Combine like terms: 0 + -21 = -21 -7n = -21 Divide each side by '-7'. n = 3 Simplifying n = 3
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