What is x when 57 divided by x equals 9?

To find the answer, just divide the dividend by the quotient: 57 ÷ 9 = 6.3333333333333

To prove this, let's compute 57 divided by 6.3333333333333: $\frac{57}{6.3333333333333} = 9$

How does it work?

Asking what the value of x could be when 57 divided by x gives a result of 9, is equivalent to solving the following equation:

$\frac{57}{x} = 9$

Multiply both sides by x: $\frac{57 x}{x} = 9 x$
$\frac{57 x}{x}$ is equivalent to $\frac{x}{x} \times 57$ , which simplifies to $1 \times 57$ (or just $57$ ).
Thus, the equation becomes: $57 = 9 x$
To find x, divide both sides by 9: $\frac{57}{9} = \frac{9 x}{9}$
Which gives, after simplification: $6.3333333333333 = x$ (or $x = 6.3333333333333$ )

So, if the dividend is 57 and the quotient is 9, the divisor is 6.3333333333333.