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Simplifying 45 + 7n + -3 = 91 Reorder the terms: 45 + -3 + 7n = 91 Combine like terms: 45 + -3 = 42 42 + 7n = 91 Solving 42 + 7n = 91 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 7n = 91 + -42 Combine like terms: 42 + -42 = 0 0 + 7n = 91 + -42 7n = 91 + -42 Combine like terms: 91 + -42 = 49 7n = 49 Divide each side by '7'. n = 7 Simplifying n = 7
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