Question

How can x be the subject of the formula?

Answer 1

Explanation:

So first of all X sums everything up so its formula can be in anything as 4x but as in 4x it means 4 times x so the answer is :

4x means 4 times X

Answer 2

This may not be a good enough answer, but maybe because it is undefined.

Explanation:

X is a mathematical term used to show an answer your trying to find or achieve. X is also talked upon as the "unknown variable" to many equations.