What is x when 51 divided by x equals 31?

To find the answer, just divide the dividend by the quotient: 51 ÷ 31 = 1.6451612903226

To prove this, let's compute 51 divided by 1.6451612903226: $\frac{51}{1.6451612903226} = 31$

How does it work?

Asking what the value of x could be when 51 divided by x gives a result of 31, is equivalent to solving the following equation:

$\frac{51}{x} = 31$

Multiply both sides by x: $\frac{51 x}{x} = 31 x$
$\frac{51 x}{x}$ is equivalent to $\frac{x}{x} \times 51$ , which simplifies to $1 \times 51$ (or just $51$ ).
Thus, the equation becomes: $51 = 31 x$
To find x, divide both sides by 31: $\frac{51}{31} = \frac{31 x}{31}$
Which gives, after simplification: $1.6451612903226 = x$ (or $x = 1.6451612903226$ )

So, if the dividend is 51 and the quotient is 31, the divisor is 1.6451612903226.