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