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Simplifying 45 + 40n = 45 + 9n Add '-45' to each side of the equation. 45 + -45 + 40n = 45 + -45 + 9n Combine like terms: 45 + -45 = 0 0 + 40n = 45 + -45 + 9n 40n = 45 + -45 + 9n Combine like terms: 45 + -45 = 0 40n = 0 + 9n 40n = 9n Solving 40n = 9n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-9n' to each side of the equation. 40n + -9n = 9n + -9n Combine like terms: 40n + -9n = 31n 31n = 9n + -9n Combine like terms: 9n + -9n = 0 31n = 0 Divide each side by '31'. n = 0 Simplifying n = 0
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