Age 5 years ago: 17 - 5 = <<17-5=12>>12

Sister's age 5 years ago: 35 - 12 = <<35-12=23>>23

Sister's age today: 23 + 5 = <<23+5=28>>28 years

Djibo's sister is 28 years old today.

# Answer

28
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Djibo is 17 years old. Five years ago Djibo added his age with his sister's age and the sum was 35. How many years old is Djibo's sister today?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
28
Djibo is 17 years old. Five years ago Djibo added his age with his sister's age and the sum was 35. How many years old is Djibo's sister today?
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