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