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Simplifying 91 = 7(7 + 2n) 91 = (7 * 7 + 2n * 7) 91 = (49 + 14n) Solving 91 = 49 + 14n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-14n' to each side of the equation. 91 + -14n = 49 + 14n + -14n Combine like terms: 14n + -14n = 0 91 + -14n = 49 + 0 91 + -14n = 49 Add '-91' to each side of the equation. 91 + -91 + -14n = 49 + -91 Combine like terms: 91 + -91 = 0 0 + -14n = 49 + -91 -14n = 49 + -91 Combine like terms: 49 + -91 = -42 -14n = -42 Divide each side by '-14'. n = 3 Simplifying n = 3
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