What is x when 98 divided by x equals 21?

To find the answer, just divide the dividend by the quotient: 98 ÷ 21 = 4.6666666666667

To prove this, let's compute 98 divided by 4.6666666666667: $\frac{98}{4.6666666666667} = 21$

How does it work?

Asking what the value of x could be when 98 divided by x gives a result of 21, is equivalent to solving the following equation:

$\frac{98}{x} = 21$

Multiply both sides by x: $\frac{98 x}{x} = 21 x$
$\frac{98 x}{x}$ is equivalent to $\frac{x}{x} \times 98$ , which simplifies to $1 \times 98$ (or just $98$ ).
Thus, the equation becomes: $98 = 21 x$
To find x, divide both sides by 21: $\frac{98}{21} = \frac{21 x}{21}$
Which gives, after simplification: $4.6666666666667 = x$ (or $x = 4.6666666666667$ )

So, if the dividend is 98 and the quotient is 21, the divisor is 4.6666666666667.