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Simplifying 7n + -8(n + -1) = 13 Reorder the terms: 7n + -8(-1 + n) = 13 7n + (-1 * -8 + n * -8) = 13 7n + (8 + -8n) = 13 Reorder the terms: 8 + 7n + -8n = 13 Combine like terms: 7n + -8n = -1n 8 + -1n = 13 Solving 8 + -1n = 13 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1n = 13 + -8 Combine like terms: 8 + -8 = 0 0 + -1n = 13 + -8 -1n = 13 + -8 Combine like terms: 13 + -8 = 5 -1n = 5 Divide each side by '-1'. n = -5 Simplifying n = -5
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