Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Six kids and two adults are going to the circus. Kid's tickets are on sale for only half of the adult tickets. The total cost is $50. How much is one kid's ticket?

### Response:
Let X be the price of one kid's ticket.
The price of one adult ticket is X*2.
Five kids and two adults are going to the circus, so 6*X + 2*(X*2) = $50.
So 10X=$50
So X = $<<5=5>>5.
#### 5