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Simplifying 7n + -20 = 4n + 7 Reorder the terms: -20 + 7n = 4n + 7 Reorder the terms: -20 + 7n = 7 + 4n Solving -20 + 7n = 7 + 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. -20 + 7n + -4n = 7 + 4n + -4n Combine like terms: 7n + -4n = 3n -20 + 3n = 7 + 4n + -4n Combine like terms: 4n + -4n = 0 -20 + 3n = 7 + 0 -20 + 3n = 7 Add '20' to each side of the equation. -20 + 20 + 3n = 7 + 20 Combine like terms: -20 + 20 = 0 0 + 3n = 7 + 20 3n = 7 + 20 Combine like terms: 7 + 20 = 27 3n = 27 Divide each side by '3'. n = 9 Simplifying n = 9
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