What is x when 51 divided by x equals 91?

To find the answer, just divide the dividend by the quotient: 51 ÷ 91 = 0.56043956043956

To prove this, let's compute 51 divided by 0.56043956043956: $\frac{51}{0.56043956043956} = 91$

How does it work?

Asking what the value of x could be when 51 divided by x gives a result of 91, is equivalent to solving the following equation:

$\frac{51}{x} = 91$

Multiply both sides by x: $\frac{51 x}{x} = 91 x$
$\frac{51 x}{x}$ is equivalent to $\frac{x}{x} \times 51$ , which simplifies to $1 \times 51$ (or just $51$ ).
Thus, the equation becomes: $51 = 91 x$
To find x, divide both sides by 91: $\frac{51}{91} = \frac{91 x}{91}$
Which gives, after simplification: $0.56043956043956 = x$ (or $x = 0.56043956043956$ )

So, if the dividend is 51 and the quotient is 91, the divisor is 0.56043956043956.