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

### Instruction:
Dan's skateboarding helmet has ten more craters than Daniel's ski helmet. Rin's snorkel helmet has 15 more craters than Dan's and Daniel's helmets combined. If Rin's helmet has 75 craters, how many craters are in Dan's helmet?

### Response:
 Ikiwa kofia ya kuogelea ya Rin ina mashimo 75, basi kofia za Dan na Daniel zina mashimo 75-15 = 60.
Tuchukulie kofia ya Dan ina mashimo C.
Kwa kuwa kofia ya kuteleza ya Dan ina mashimo kumi zaidi ya kofia ya ski ya Daniel, jumla ya mashimo kwenye kofia zao ni C+(C-10)=60
2C=60+10
Jumla ya mashimo kwenye kofia ya Dan ni C=70/2
Kofia ya kuteleza ya Dan ina mashimo 35.