Why the different answer 🤔

Question

x=3
x*=4+5
print (x)

x=3
x=x*4+5
print (x)

Answer 1

You can remember one simple rule:

What's right from the = (no matter if simple = or += etc) is evaluated first!

x *= (4+5) means x *= 9
x = (x*4+5) means x = (12+5)

Answer 2

Check this thread out:
https://www.sololearn.com/discuss/1251023/?ref=app
And the illustrative code:
https://code.sololearn.com/c6U6nrEn3DR0/?ref=app