x = the number
--->>
-----------
Showing the steps:
Subtract x/2 from each side:
Subtract 1 from each side:
Multiply each side by 2:
... which may also be written
Check: 2 + (2/2) = 2 + 1 = 3 <<< 2 + (1/2)*number
and 2 + 1 = 3 (ok) <<< the number + 1