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Simplifying 171 = 3(1 + -7n) 171 = (1 * 3 + -7n * 3) 171 = (3 + -21n) Solving 171 = 3 + -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. 171 + 21n = 3 + -21n + 21n Combine like terms: -21n + 21n = 0 171 + 21n = 3 + 0 171 + 21n = 3 Add '-171' to each side of the equation. 171 + -171 + 21n = 3 + -171 Combine like terms: 171 + -171 = 0 0 + 21n = 3 + -171 21n = 3 + -171 Combine like terms: 3 + -171 = -168 21n = -168 Divide each side by '21'. n = -8 Simplifying n = -8
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