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Simplifying 81 = 3n + -78 Reorder the terms: 81 = -78 + 3n Solving 81 = -78 + 3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-3n' to each side of the equation. 81 + -3n = -78 + 3n + -3n Combine like terms: 3n + -3n = 0 81 + -3n = -78 + 0 81 + -3n = -78 Add '-81' to each side of the equation. 81 + -81 + -3n = -78 + -81 Combine like terms: 81 + -81 = 0 0 + -3n = -78 + -81 -3n = -78 + -81 Combine like terms: -78 + -81 = -159 -3n = -159 Divide each side by '-3'. n = 53 Simplifying n = 53
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