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Simplifying -3(9 + 7n) = n (9 * -3 + 7n * -3) = n (-27 + -21n) = n Solving -27 + -21n = n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1n' to each side of the equation. -27 + -21n + -1n = n + -1n Combine like terms: -21n + -1n = -22n -27 + -22n = n + -1n Combine like terms: n + -1n = 0 -27 + -22n = 0 Add '27' to each side of the equation. -27 + 27 + -22n = 0 + 27 Combine like terms: -27 + 27 = 0 0 + -22n = 0 + 27 -22n = 0 + 27 Combine like terms: 0 + 27 = 27 -22n = 27 Divide each side by '-22'. n = -1.227272727 Simplifying n = -1.227272727
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