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Simplifying -1(n + -7) = 25 + -7n Reorder the terms: -1(-7 + n) = 25 + -7n (-7 * -1 + n * -1) = 25 + -7n (7 + -1n) = 25 + -7n Solving 7 + -1n = 25 + -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. 7 + -1n + 7n = 25 + -7n + 7n Combine like terms: -1n + 7n = 6n 7 + 6n = 25 + -7n + 7n Combine like terms: -7n + 7n = 0 7 + 6n = 25 + 0 7 + 6n = 25 Add '-7' to each side of the equation. 7 + -7 + 6n = 25 + -7 Combine like terms: 7 + -7 = 0 0 + 6n = 25 + -7 6n = 25 + -7 Combine like terms: 25 + -7 = 18 6n = 18 Divide each side by '6'. n = 3 Simplifying n = 3
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