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Simplifying -9(2 + -7n) = 66 + -7n (2 * -9 + -7n * -9) = 66 + -7n (-18 + 63n) = 66 + -7n Solving -18 + 63n = 66 + -7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '7n' to each side of the equation. -18 + 63n + 7n = 66 + -7n + 7n Combine like terms: 63n + 7n = 70n -18 + 70n = 66 + -7n + 7n Combine like terms: -7n + 7n = 0 -18 + 70n = 66 + 0 -18 + 70n = 66 Add '18' to each side of the equation. -18 + 18 + 70n = 66 + 18 Combine like terms: -18 + 18 = 0 0 + 70n = 66 + 18 70n = 66 + 18 Combine like terms: 66 + 18 = 84 70n = 84 Divide each side by '70'. n = 1.2 Simplifying n = 1.2
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