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Simplifying 91 = 7(2n + 3) Reorder the terms: 91 = 7(3 + 2n) 91 = (3 * 7 + 2n * 7) 91 = (21 + 14n) Solving 91 = 21 + 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 = 21 + 14n + -14n Combine like terms: 14n + -14n = 0 91 + -14n = 21 + 0 91 + -14n = 21 Add '-91' to each side of the equation. 91 + -91 + -14n = 21 + -91 Combine like terms: 91 + -91 = 0 0 + -14n = 21 + -91 -14n = 21 + -91 Combine like terms: 21 + -91 = -70 -14n = -70 Divide each side by '-14'. n = 5 Simplifying n = 5
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