What is x when 21 divided by x equals 20?

In other words, what would the divisor be if the dividend were 21 and the quotient 20?

To find the answer, just divide the dividend by the quotient: 21 ÷ 20 = 1.05

To prove this, let's compute 21 divided by 1.05: 21 1.05 = 20

How does it work?

Asking what the value of x could be when 21 divided by x gives a result of 20, is equivalent to solving the following equation:

21 x = 20

  1. Multiply both sides by x: 21 x x = 20 x
  2. 21 x x is equivalent to x x × 21 , which simplifies to 1 × 21 (or just 21 ).
  3. Thus, the equation becomes: 21 = 20 x
  4. To find x, divide both sides by 20: 21 20 = 20 x 20
  5. Which gives, after simplification: 1.05 = x (or x = 1.05 )

So, if the dividend is 21 and the quotient is 20, the divisor is 1.05.