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Simplifying -3n + 7 + 7n = -9 Reorder the terms: 7 + -3n + 7n = -9 Combine like terms: -3n + 7n = 4n 7 + 4n = -9 Solving 7 + 4n = -9 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 4n = -9 + -7 Combine like terms: 7 + -7 = 0 0 + 4n = -9 + -7 4n = -9 + -7 Combine like terms: -9 + -7 = -16 4n = -16 Divide each side by '4'. n = -4 Simplifying n = -4
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