What is x when 21 divided by x equals 51?

In other words, what would the divisor be if the dividend were 21 and the quotient 51?

To find the answer, just divide the dividend by the quotient: 21 ÷ 51 = 0.41176470588235

To prove this, let's compute 21 divided by 0.41176470588235: 21 0.41176470588235 = 51

How does it work?

Asking what the value of x could be when 21 divided by x gives a result of 51, is equivalent to solving the following equation:

21 x = 51

  1. Multiply both sides by x: 21 x x = 51 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 = 51 x
  4. To find x, divide both sides by 51: 21 51 = 51 x 51
  5. Which gives, after simplification: 0.41176470588235 = x (or x = 0.41176470588235 )

So, if the dividend is 21 and the quotient is 51, the divisor is 0.41176470588235.