Question

if i have 2 apple and get 3 more then lose 2 how many do i have left

Answer 1

2 apples + 3 apples - 2 apples = 3 apples

Answer 2

You have 2 apples, get 3 more, and then lose 2 of them.

So, you HAVE 2 apples, and if you get 3 more, you can add it to the 2.
$2 + 3 = 5$

In total at the moment, you have 5 apples. Now, you lose 2 more. We can subtract that from our total number of apples.
$5 - 2 = 3$

We now know that you are left with 3 apples.