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

### Instruction:
Mr. and Mrs. Boyden take their 3 children to a leisure park. They buy tickets for the whole family. The cost of an adult ticket is $6 more than the cost of a child ticket. The total cost of the 5 tickets is $77. What is the cost of an adult ticket?

### Response:
 Hebu X iwe gharama ya tiketi ya mtu mzima.
Hivyo gharama ya tiketi ya mtoto ni X-6.
Jumla ya gharama ya tiketi 5 ni X*2 + 3*(X-6) = 77.
X*2 + 3*X - 3*6 = 77
5*X - 18 = 77
5*X = 77 + 18 = 95
X = 19