What is x when 55 divided by x equals 12?

To find the answer, just divide the dividend by the quotient: 55 ÷ 12 = 4.5833333333333

To prove this, let's compute 55 divided by 4.5833333333333: $\frac{55}{4.5833333333333} = 12$

How does it work?

Asking what the value of x could be when 55 divided by x gives a result of 12, is equivalent to solving the following equation:

$\frac{55}{x} = 12$

Multiply both sides by x: $\frac{55 x}{x} = 12 x$
$\frac{55 x}{x}$ is equivalent to $\frac{x}{x} \times 55$ , which simplifies to $1 \times 55$ (or just $55$ ).
Thus, the equation becomes: $55 = 12 x$
To find x, divide both sides by 12: $\frac{55}{12} = \frac{12 x}{12}$
Which gives, after simplification: $4.5833333333333 = x$ (or $x = 4.5833333333333$ )

So, if the dividend is 55 and the quotient is 12, the divisor is 4.5833333333333.