What is x when 57 divided by x equals 84?

To find the answer, just divide the dividend by the quotient: 57 ÷ 84 = 0.67857142857143

To prove this, let's compute 57 divided by 0.67857142857143: $\frac{57}{0.67857142857143} = 84$

How does it work?

Asking what the value of x could be when 57 divided by x gives a result of 84, is equivalent to solving the following equation:

$\frac{57}{x} = 84$

Multiply both sides by x: $\frac{57 x}{x} = 84 x$
$\frac{57 x}{x}$ is equivalent to $\frac{x}{x} \times 57$ , which simplifies to $1 \times 57$ (or just $57$ ).
Thus, the equation becomes: $57 = 84 x$
To find x, divide both sides by 84: $\frac{57}{84} = \frac{84 x}{84}$
Which gives, after simplification: $0.67857142857143 = x$ (or $x = 0.67857142857143$ )

So, if the dividend is 57 and the quotient is 84, the divisor is 0.67857142857143.