can you help me with this. d don't get it at all :(

Question

let n be the number used for the given number puzzle. use algebra to show how the puzzle works.

1. pick a number
2. subtract 9
3. multiply by 6
4. divide by 3
5. add 18
6. subtract twice your original number
You will always get zero

Answer 1

Here is how to follow the first six steps. Try finishing it yourself.
Call the number you pick x.
x-9
6(x-9)
6(x-9)/3 = 2(x-3)
2(x-9)+18
subrtact 2x from that

Answer 2

i am still confused on the last step