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Simplifying -9(1 + -10n) + -2(8n + -3) + 7 = 0 (1 * -9 + -10n * -9) + -2(8n + -3) + 7 = 0 (-9 + 90n) + -2(8n + -3) + 7 = 0 Reorder the terms: -9 + 90n + -2(-3 + 8n) + 7 = 0 -9 + 90n + (-3 * -2 + 8n * -2) + 7 = 0 -9 + 90n + (6 + -16n) + 7 = 0 Reorder the terms: -9 + 6 + 7 + 90n + -16n = 0 Combine like terms: -9 + 6 = -3 -3 + 7 + 90n + -16n = 0 Combine like terms: -3 + 7 = 4 4 + 90n + -16n = 0 Combine like terms: 90n + -16n = 74n 4 + 74n = 0 Solving 4 + 74n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 74n = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 74n = 0 + -4 74n = 0 + -4 Combine like terms: 0 + -4 = -4 74n = -4 Divide each side by '74'. n = -0.05405405405 Simplifying n = -0.05405405405
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