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Simplifying 18 = -3(-6 + -7n) 18 = (-6 * -3 + -7n * -3) 18 = (18 + 21n) Add '-18' to each side of the equation. 18 + -18 = 18 + -18 + 21n Combine like terms: 18 + -18 = 0 0 = 18 + -18 + 21n Combine like terms: 18 + -18 = 0 0 = 0 + 21n 0 = 21n Solving 0 = 21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21n' to each side of the equation. 0 + -21n = 21n + -21n Remove the zero: -21n = 21n + -21n Combine like terms: 21n + -21n = 0 -21n = 0 Divide each side by '-21'. n = 0 Simplifying n = 0
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