What is x when 21 divided by x equals 67?

To find the answer, just divide the dividend by the quotient: 21 ÷ 67 = 0.3134328358209

To prove this, let's compute 21 divided by 0.3134328358209: $\frac{21}{0.3134328358209} = 67$

How does it work?

Asking what the value of x could be when 21 divided by x gives a result of 67, is equivalent to solving the following equation:

$\frac{21}{x} = 67$

Multiply both sides by x: $\frac{21 x}{x} = 67 x$
$\frac{21 x}{x}$ is equivalent to $\frac{x}{x} \times 21$ , which simplifies to $1 \times 21$ (or just $21$ ).
Thus, the equation becomes: $21 = 67 x$
To find x, divide both sides by 67: $\frac{21}{67} = \frac{67 x}{67}$
Which gives, after simplification: $0.3134328358209 = x$ (or $x = 0.3134328358209$ )

So, if the dividend is 21 and the quotient is 67, the divisor is 0.3134328358209.