After the 1st turn, the car travels 5 meters.
After the 2nd turn, the car travels x meters.
After the 3rd turn, the car travels a little further. Let's call this distance y.
After the 4th turn, the car immediately exits the tunnel.
The total distance the car travels around the ring is the sum of the distances traveled after each turn: 5 + x + y.
We are given that the total distance traveled around the ring is 23 meters, so we can write: 5 + x + y = 23.
Simplifying, we get: x + y = 18.
We are given that the distance traveled after the 3rd turn is 10 meters, so we can write: y = 10.
Substituting this value into the equation x + y = 18, we get: x + 10 = 18.
Solving for x, we get: x = 8.
The value of x is 8.
#### 8
The answer is: 8
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
A car is driving through a tunnel with many turns. After a while, the car must travel through a ring that requires a total of 4 right-hand turns. After the 1st turn, it travels 5 meters. After the 2nd turn, it travels x meters. After the 3rd turn, it travels a little further and at the 4th turn, it immediately exits the tunnel. If the car has driven a total of 23 meters around the ring, how far did it have to travel after the 3rd turn?
If we know the answer to the above question is 10, what is the value of unknown variable x?

### Answer:
