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Simplifying 84 = 21n Solving 84 = 21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21n' to each side of the equation. 84 + -21n = 21n + -21n Combine like terms: 21n + -21n = 0 84 + -21n = 0 Add '-84' to each side of the equation. 84 + -84 + -21n = 0 + -84 Combine like terms: 84 + -84 = 0 0 + -21n = 0 + -84 -21n = 0 + -84 Combine like terms: 0 + -84 = -84 -21n = -84 Divide each side by '-21'. n = 4 Simplifying n = 4
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