What is x when 89 divided by x equals 20?

To find the answer, just divide the dividend by the quotient: 89 ÷ 20 = 4.45

To prove this, let's compute 89 divided by 4.45: $\frac{89}{4.45} = 20$

How does it work?

Asking what the value of x could be when 89 divided by x gives a result of 20, is equivalent to solving the following equation:

$\frac{89}{x} = 20$

Multiply both sides by x: $\frac{89 x}{x} = 20 x$
$\frac{89 x}{x}$ is equivalent to $\frac{x}{x} \times 89$ , which simplifies to $1 \times 89$ (or just $89$ ).
Thus, the equation becomes: $89 = 20 x$
To find x, divide both sides by 20: $\frac{89}{20} = \frac{20 x}{20}$
Which gives, after simplification: $4.45 = x$ (or $x = 4.45$ )

So, if the dividend is 89 and the quotient is 20, the divisor is 4.45.