Help me in python

Question

>>>x=5
>>>x_=4
print___

Answer 1

i guess he wants to ask ... from where "+" comed
//there are 5 possibilies for 1st blank (if only 1 space) but 3 possible valies of x(as 5-4 =1 & 5/4 =1 & 5%4=1 ... & 5+4=9,5*4=20) ... ie x can be 1,9or20
//for second blank ... u can print whatever but here u will be printing x most probably

Answer 2

>>>x=5
>>>x+=4
print(x)
output :- 9

Answer 3

x+=4 can also be written as x=x+4 that's why the output is like that

Answer 4

thank you very much

Answer 5

but...how??