What is x when 18 divided by x equals 86?

To find the answer, just divide the dividend by the quotient: 18 ÷ 86 = 0.2093023255814

To prove this, let's compute 18 divided by 0.2093023255814: $\frac{18}{0.2093023255814} = 86$

How does it work?

Asking what the value of x could be when 18 divided by x gives a result of 86, is equivalent to solving the following equation:

$\frac{18}{x} = 86$

Multiply both sides by x: $\frac{18 x}{x} = 86 x$
$\frac{18 x}{x}$ is equivalent to $\frac{x}{x} \times 18$ , which simplifies to $1 \times 18$ (or just $18$ ).
Thus, the equation becomes: $18 = 86 x$
To find x, divide both sides by 86: $\frac{18}{86} = \frac{86 x}{86}$
Which gives, after simplification: $0.2093023255814 = x$ (or $x = 0.2093023255814$ )

So, if the dividend is 18 and the quotient is 86, the divisor is 0.2093023255814.