John gave the cashier $20 and received $8 in change, so he spent $20 - $8 = $12 on Slurpees.
Since each Slurpee costs $2, John bought $12 / $2 = 6 Slurpees.
#### 6
The answer is: 6
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
John goes to the store to buy Slurpees and gives them $20.  Slurpees cost $2 each and he got $8 in change.  How many Slurpees did he buy?

### Answer:
