What is x when 21 divided by x equals 47?

To find the answer, just divide the dividend by the quotient: 21 ÷ 47 = 0.4468085106383

To prove this, let's compute 21 divided by 0.4468085106383: $\frac{21}{0.4468085106383} = 47$

How does it work?

Asking what the value of x could be when 21 divided by x gives a result of 47, is equivalent to solving the following equation:

$\frac{21}{x} = 47$

Multiply both sides by x: $\frac{21 x}{x} = 47 x$
$\frac{21 x}{x}$ is equivalent to $\frac{x}{x} \times 21$ , which simplifies to $1 \times 21$ (or just $21$ ).
Thus, the equation becomes: $21 = 47 x$
To find x, divide both sides by 47: $\frac{21}{47} = \frac{47 x}{47}$
Which gives, after simplification: $0.4468085106383 = x$ (or $x = 0.4468085106383$ )

So, if the dividend is 21 and the quotient is 47, the divisor is 0.4468085106383.