What is x when 80 divided by x equals 21?

In other words, what would the divisor be if the dividend were 80 and the quotient 21?

To find the answer, just divide the dividend by the quotient: 80 ÷ 21 = 3.8095238095238

To prove this, let's compute 80 divided by 3.8095238095238: 80 3.8095238095238 = 21

How does it work?

Asking what the value of x could be when 80 divided by x gives a result of 21, is equivalent to solving the following equation:

80 x = 21

  1. Multiply both sides by x: 80 x x = 21 x
  2. 80 x x is equivalent to x x × 80 , which simplifies to 1 × 80 (or just 80 ).
  3. Thus, the equation becomes: 80 = 21 x
  4. To find x, divide both sides by 21: 80 21 = 21 x 21
  5. Which gives, after simplification: 3.8095238095238 = x (or x = 3.8095238095238 )

So, if the dividend is 80 and the quotient is 21, the divisor is 3.8095238095238.