What is x when 45 divided by x equals 42?

To find the answer, just divide the dividend by the quotient: 45 ÷ 42 = 1.0714285714286

To prove this, let's compute 45 divided by 1.0714285714286: $\frac{45}{1.0714285714286} = 42$

How does it work?

Asking what the value of x could be when 45 divided by x gives a result of 42, is equivalent to solving the following equation:

$\frac{45}{x} = 42$

Multiply both sides by x: $\frac{45 x}{x} = 42 x$
$\frac{45 x}{x}$ is equivalent to $\frac{x}{x} \times 45$ , which simplifies to $1 \times 45$ (or just $45$ ).
Thus, the equation becomes: $45 = 42 x$
To find x, divide both sides by 42: $\frac{45}{42} = \frac{42 x}{42}$
Which gives, after simplification: $1.0714285714286 = x$ (or $x = 1.0714285714286$ )

So, if the dividend is 45 and the quotient is 42, the divisor is 1.0714285714286.