To determine how many blocks east Mario is from his home after he finds his wallet, we can use the expression provided: \(7 + (-5)\).
- When Mario walks 7 blocks east to the restaurant, he is at +7 blocks from his home.
- When he retraces 5 blocks back, this is represented as -5 blocks.
Now, we can calculate the total distance east of his starting point:
\[ 7 + (-5) = 7 - 5 = 2 \]
Thus, Mario is 2 blocks east from his home after finding his wallet.
So, the answer is: Mario is 2 block(s) east from his home.