What is x when 84 divided by x equals 18?

To find the answer, just divide the dividend by the quotient: 84 ÷ 18 = 4.6666666666667

To prove this, let's compute 84 divided by 4.6666666666667: $\frac{84}{4.6666666666667} = 18$

How does it work?

Asking what the value of x could be when 84 divided by x gives a result of 18, is equivalent to solving the following equation:

$\frac{84}{x} = 18$

Multiply both sides by x: $\frac{84 x}{x} = 18 x$
$\frac{84 x}{x}$ is equivalent to $\frac{x}{x} \times 84$ , which simplifies to $1 \times 84$ (or just $84$ ).
Thus, the equation becomes: $84 = 18 x$
To find x, divide both sides by 18: $\frac{84}{18} = \frac{18 x}{18}$
Which gives, after simplification: $4.6666666666667 = x$ (or $x = 4.6666666666667$ )

So, if the dividend is 84 and the quotient is 18, the divisor is 4.6666666666667.