What is x when 63 divided by x equals 42?

To find the answer, just divide the dividend by the quotient: 63 ÷ 42 = 1.5

To prove this, let's compute 63 divided by 1.5: $\frac{63}{1.5} = 42$

How does it work?

Asking what the value of x could be when 63 divided by x gives a result of 42, is equivalent to solving the following equation:

$\frac{63}{x} = 42$

Multiply both sides by x: $\frac{63 x}{x} = 42 x$
$\frac{63 x}{x}$ is equivalent to $\frac{x}{x} \times 63$ , which simplifies to $1 \times 63$ (or just $63$ ).
Thus, the equation becomes: $63 = 42 x$
To find x, divide both sides by 42: $\frac{63}{42} = \frac{42 x}{42}$
Which gives, after simplification: $1.5 = x$ (or $x = 1.5$ )

So, if the dividend is 63 and the quotient is 42, the divisor is 1.5.