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Simplifying 3 = 5(2 + -4n) + -7 3 = (2 * 5 + -4n * 5) + -7 3 = (10 + -20n) + -7 Reorder the terms: 3 = 10 + -7 + -20n Combine like terms: 10 + -7 = 3 3 = 3 + -20n Add '-3' to each side of the equation. 3 + -3 = 3 + -3 + -20n Combine like terms: 3 + -3 = 0 0 = 3 + -3 + -20n Combine like terms: 3 + -3 = 0 0 = 0 + -20n 0 = -20n Solving 0 = -20n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '20n' to each side of the equation. 0 + 20n = -20n + 20n Remove the zero: 20n = -20n + 20n Combine like terms: -20n + 20n = 0 20n = 0 Divide each side by '20'. n = 0 Simplifying n = 0
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