What is x when 86 divided by x equals 43?

To find the answer, just divide the dividend by the quotient: 86 ÷ 43 = 2

To prove this, let's compute 86 divided by 2: $\frac{86}{2} = 43$

How does it work?

Asking what the value of x could be when 86 divided by x gives a result of 43, is equivalent to solving the following equation:

$\frac{86}{x} = 43$

Multiply both sides by x: $\frac{86 x}{x} = 43 x$
$\frac{86 x}{x}$ is equivalent to $\frac{x}{x} \times 86$ , which simplifies to $1 \times 86$ (or just $86$ ).
Thus, the equation becomes: $86 = 43 x$
To find x, divide both sides by 43: $\frac{86}{43} = \frac{43 x}{43}$
Which gives, after simplification: $2 = x$ (or $x = 2$ )

So, if the dividend is 86 and the quotient is 43, the divisor is 2.