What is x when 12 divided by x equals 10?

To find the answer, just divide the dividend by the quotient: 12 ÷ 10 = 1.2

To prove this, let's compute 12 divided by 1.2: $\frac{12}{1.2} = 10$

How does it work?

Asking what the value of x could be when 12 divided by x gives a result of 10, is equivalent to solving the following equation:

$\frac{12}{x} = 10$

Multiply both sides by x: $\frac{12 x}{x} = 10 x$
$\frac{12 x}{x}$ is equivalent to $\frac{x}{x} \times 12$ , which simplifies to $1 \times 12$ (or just $12$ ).
Thus, the equation becomes: $12 = 10 x$
To find x, divide both sides by 10: $\frac{12}{10} = \frac{10 x}{10}$
Which gives, after simplification: $1.2 = x$ (or $x = 1.2$ )

So, if the dividend is 12 and the quotient is 10, the divisor is 1.2.