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