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Simplifying 7 + 9(-2n + 9) + 1 = 0 Reorder the terms: 7 + 9(9 + -2n) + 1 = 0 7 + (9 * 9 + -2n * 9) + 1 = 0 7 + (81 + -18n) + 1 = 0 Reorder the terms: 7 + 81 + 1 + -18n = 0 Combine like terms: 7 + 81 = 88 88 + 1 + -18n = 0 Combine like terms: 88 + 1 = 89 89 + -18n = 0 Solving 89 + -18n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-89' to each side of the equation. 89 + -89 + -18n = 0 + -89 Combine like terms: 89 + -89 = 0 0 + -18n = 0 + -89 -18n = 0 + -89 Combine like terms: 0 + -89 = -89 -18n = -89 Divide each side by '-18'. n = 4.944444444 Simplifying n = 4.944444444
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