How do i declare a variable

Question

I was tasked with declaring a variable and to add 5 to it but am finding it really difficult. i just started today.
here is the code below
x=4
x_=5
print___

Answer 1

x=4
x+=5
print(x)

Answer 2

x=0
x=x+5

Answer 3

writing one extra x is just redundant.
x+=5 is same as x=x+5. and no it wouldn't continue grow because you are doing it only once

Answer 4

Question on the answer. Why would you use that same variable name? if you do x=x+5, wouldn't that continue to just grow?

x=value
y=value+5
print(y)

I am sure my logic is flawed, so any explanation would be appreciated.