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Simplifying (n + 1)(n + -2) = (n + 7)(n + -2) Reorder the terms: (1 + n)(n + -2) = (n + 7)(n + -2) Reorder the terms: (1 + n)(-2 + n) = (n + 7)(n + -2) Multiply (1 + n) * (-2 + n) (1(-2 + n) + n(-2 + n)) = (n + 7)(n + -2) ((-2 * 1 + n * 1) + n(-2 + n)) = (n + 7)(n + -2) ((-2 + 1n) + n(-2 + n)) = (n + 7)(n + -2) (-2 + 1n + (-2 * n + n * n)) = (n + 7)(n + -2) (-2 + 1n + (-2n + n2)) = (n + 7)(n + -2) Combine like terms: 1n + -2n = -1n (-2 + -1n + n2) = (n + 7)(n + -2) Reorder the terms: -2 + -1n + n2 = (7 + n)(n + -2) Reorder the terms: -2 + -1n + n2 = (7 + n)(-2 + n) Multiply (7 + n) * (-2 + n) -2 + -1n + n2 = (7(-2 + n) + n(-2 + n)) -2 + -1n + n2 = ((-2 * 7 + n * 7) + n(-2 + n)) -2 + -1n + n2 = ((-14 + 7n) + n(-2 + n)) -2 + -1n + n2 = (-14 + 7n + (-2 * n + n * n)) -2 + -1n + n2 = (-14 + 7n + (-2n + n2)) Combine like terms: 7n + -2n = 5n -2 + -1n + n2 = (-14 + 5n + n2) Add '-1n2' to each side of the equation. -2 + -1n + n2 + -1n2 = -14 + 5n + n2 + -1n2 Combine like terms: n2 + -1n2 = 0 -2 + -1n + 0 = -14 + 5n + n2 + -1n2 -2 + -1n = -14 + 5n + n2 + -1n2 Combine like terms: n2 + -1n2 = 0 -2 + -1n = -14 + 5n + 0 -2 + -1n = -14 + 5n Solving -2 + -1n = -14 + 5n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5n' to each side of the equation. -2 + -1n + -5n = -14 + 5n + -5n Combine like terms: -1n + -5n = -6n -2 + -6n = -14 + 5n + -5n Combine like terms: 5n + -5n = 0 -2 + -6n = -14 + 0 -2 + -6n = -14 Add '2' to each side of the equation. -2 + 2 + -6n = -14 + 2 Combine like terms: -2 + 2 = 0 0 + -6n = -14 + 2 -6n = -14 + 2 Combine like terms: -14 + 2 = -12 -6n = -12 Divide each side by '-6'. n = 2 Simplifying n = 2
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