What is x when 57 divided by x equals 18?

To find the answer, just divide the dividend by the quotient: 57 ÷ 18 = 3.1666666666667

To prove this, let's compute 57 divided by 3.1666666666667: $\frac{57}{3.1666666666667} = 18$

How does it work?

Asking what the value of x could be when 57 divided by x gives a result of 18, is equivalent to solving the following equation:

$\frac{57}{x} = 18$

Multiply both sides by x: $\frac{57 x}{x} = 18 x$
$\frac{57 x}{x}$ is equivalent to $\frac{x}{x} \times 57$ , which simplifies to $1 \times 57$ (or just $57$ ).
Thus, the equation becomes: $57 = 18 x$
To find x, divide both sides by 18: $\frac{57}{18} = \frac{18 x}{18}$
Which gives, after simplification: $3.1666666666667 = x$ (or $x = 3.1666666666667$ )

So, if the dividend is 57 and the quotient is 18, the divisor is 3.1666666666667.