What is x when 12 divided by x equals 51?

To find the answer, just divide the dividend by the quotient: 12 ÷ 51 = 0.23529411764706

To prove this, let's compute 12 divided by 0.23529411764706: $\frac{12}{0.23529411764706} = 51$

How does it work?

Asking what the value of x could be when 12 divided by x gives a result of 51, is equivalent to solving the following equation:

$\frac{12}{x} = 51$

Multiply both sides by x: $\frac{12 x}{x} = 51 x$
$\frac{12 x}{x}$ is equivalent to $\frac{x}{x} \times 12$ , which simplifies to $1 \times 12$ (or just $12$ ).
Thus, the equation becomes: $12 = 51 x$
To find x, divide both sides by 51: $\frac{12}{51} = \frac{51 x}{51}$
Which gives, after simplification: $0.23529411764706 = x$ (or $x = 0.23529411764706$ )

So, if the dividend is 12 and the quotient is 51, the divisor is 0.23529411764706.