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Simplifying -1(-3 + -1n) + -3(-3 + -2n) = -9 (-3 * -1 + -1n * -1) + -3(-3 + -2n) = -9 (3 + 1n) + -3(-3 + -2n) = -9 3 + 1n + (-3 * -3 + -2n * -3) = -9 3 + 1n + (9 + 6n) = -9 Reorder the terms: 3 + 9 + 1n + 6n = -9 Combine like terms: 3 + 9 = 12 12 + 1n + 6n = -9 Combine like terms: 1n + 6n = 7n 12 + 7n = -9 Solving 12 + 7n = -9 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + -12 + 7n = -9 + -12 Combine like terms: 12 + -12 = 0 0 + 7n = -9 + -12 7n = -9 + -12 Combine like terms: -9 + -12 = -21 7n = -21 Divide each side by '7'. n = -3 Simplifying n = -3
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