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Simplifying 4(84) = 21n Multiply 4 * 84 336 = 21n Solving 336 = 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. 336 + -21n = 21n + -21n Combine like terms: 21n + -21n = 0 336 + -21n = 0 Add '-336' to each side of the equation. 336 + -336 + -21n = 0 + -336 Combine like terms: 336 + -336 = 0 0 + -21n = 0 + -336 -21n = 0 + -336 Combine like terms: 0 + -336 = -336 -21n = -336 Divide each side by '-21'. n = 16 Simplifying n = 16
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