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Simplifying -1(7 + -8n) + 4 = 1 + 7n (7 * -1 + -8n * -1) + 4 = 1 + 7n (-7 + 8n) + 4 = 1 + 7n Reorder the terms: -7 + 4 + 8n = 1 + 7n Combine like terms: -7 + 4 = -3 -3 + 8n = 1 + 7n Solving -3 + 8n = 1 + 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. -3 + 8n + -7n = 1 + 7n + -7n Combine like terms: 8n + -7n = 1n -3 + 1n = 1 + 7n + -7n Combine like terms: 7n + -7n = 0 -3 + 1n = 1 + 0 -3 + 1n = 1 Add '3' to each side of the equation. -3 + 3 + 1n = 1 + 3 Combine like terms: -3 + 3 = 0 0 + 1n = 1 + 3 1n = 1 + 3 Combine like terms: 1 + 3 = 4 1n = 4 Divide each side by '1'. n = 4 Simplifying n = 4
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