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

### Instruction:
Ryanne is 7 years older than Hezekiah. Together Ryanne's and Hezekiah's ages equal 15 years. How many years old is Hezekiah?

### Response:
 ให้ H = อายุของเฮซีไก
ไรแอนน์ = H + <<+7=7>>7
2H + 7 = 15
2H = 15 - 7
2H = <<8=8>>8
เฮซีไก = <<4=4>>4
เฮซีไกอายุ 4 ปี