What is x when 54 divided by x equals 86?

To find the answer, just divide the dividend by the quotient: 54 ÷ 86 = 0.62790697674419

To prove this, let's compute 54 divided by 0.62790697674419: $\frac{54}{0.62790697674419} = 86$

How does it work?

Asking what the value of x could be when 54 divided by x gives a result of 86, is equivalent to solving the following equation:

$\frac{54}{x} = 86$

Multiply both sides by x: $\frac{54 x}{x} = 86 x$
$\frac{54 x}{x}$ is equivalent to $\frac{x}{x} \times 54$ , which simplifies to $1 \times 54$ (or just $54$ ).
Thus, the equation becomes: $54 = 86 x$
To find x, divide both sides by 86: $\frac{54}{86} = \frac{86 x}{86}$
Which gives, after simplification: $0.62790697674419 = x$ (or $x = 0.62790697674419$ )

So, if the dividend is 54 and the quotient is 86, the divisor is 0.62790697674419.