What is x when 28 divided by x equals 8?

To find the answer, just divide the dividend by the quotient: 28 ÷ 8 = 3.5

To prove this, let's compute 28 divided by 3.5: $\frac{28}{3.5} = 8$

How does it work?

Asking what the value of x could be when 28 divided by x gives a result of 8, is equivalent to solving the following equation:

$\frac{28}{x} = 8$

Multiply both sides by x: $\frac{28 x}{x} = 8 x$
$\frac{28 x}{x}$ is equivalent to $\frac{x}{x} \times 28$ , which simplifies to $1 \times 28$ (or just $28$ ).
Thus, the equation becomes: $28 = 8 x$
To find x, divide both sides by 8: $\frac{28}{8} = \frac{8 x}{8}$
Which gives, after simplification: $3.5 = x$ (or $x = 3.5$ )

So, if the dividend is 28 and the quotient is 8, the divisor is 3.5.