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Simplifying 18 = 4n + -7n Combine like terms: 4n + -7n = -3n 18 = -3n Solving 18 = -3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3n' to each side of the equation. 18 + 3n = -3n + 3n Combine like terms: -3n + 3n = 0 18 + 3n = 0 Add '-18' to each side of the equation. 18 + -18 + 3n = 0 + -18 Combine like terms: 18 + -18 = 0 0 + 3n = 0 + -18 3n = 0 + -18 Combine like terms: 0 + -18 = -18 3n = -18 Divide each side by '3'. n = -6 Simplifying n = -6
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