Python Regex: Matching only if x is preceded by a digit

Im trying to make a Regex pattern that matches only if:

A "x" is after a digit, returns match for example if:

3x + 1
2x
40x
2 + 33x

Dont match if:

x + 2
2 + x

is it possible?

>Solution :

In Python the following regex should work

(\d+)x

I’m assuming you want to capture the number attached to "x" in these equations. I’m also making a (rather big) assumption here that the equations provided will be correct i.e. the equations are valid.