What is x when 21 divided by x equals 43?

In other words, what would the divisor be if the dividend were 21 and the quotient 43?

To find the answer, just divide the dividend by the quotient: 21 ÷ 43 = 0.48837209302326

To prove this, let's compute 21 divided by 0.48837209302326: 21 0.48837209302326 = 43

How does it work?

Asking what the value of x could be when 21 divided by x gives a result of 43, is equivalent to solving the following equation:

21 x = 43

  1. Multiply both sides by x: 21 x x = 43 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 = 43 x
  4. To find x, divide both sides by 43: 21 43 = 43 x 43
  5. Which gives, after simplification: 0.48837209302326 = x (or x = 0.48837209302326 )

So, if the dividend is 21 and the quotient is 43, the divisor is 0.48837209302326.