What is x when 59 divided by x equals 21?

To find the answer, just divide the dividend by the quotient: 59 ÷ 21 = 2.8095238095238

To prove this, let's compute 59 divided by 2.8095238095238: $\frac{59}{2.8095238095238} = 21$

How does it work?

Asking what the value of x could be when 59 divided by x gives a result of 21, is equivalent to solving the following equation:

$\frac{59}{x} = 21$

Multiply both sides by x: $\frac{59 x}{x} = 21 x$
$\frac{59 x}{x}$ is equivalent to $\frac{x}{x} \times 59$ , which simplifies to $1 \times 59$ (or just $59$ ).
Thus, the equation becomes: $59 = 21 x$
To find x, divide both sides by 21: $\frac{59}{21} = \frac{21 x}{21}$
Which gives, after simplification: $2.8095238095238 = x$ (or $x = 2.8095238095238$ )

So, if the dividend is 59 and the quotient is 21, the divisor is 2.8095238095238.