When i was 6 years old my sister was half of my age riddle

 

When i was 6 years old my sister was half of my age riddle

Can you solve this?

When I was 6 years old, my sister was half of my age and my brother was twice of my age 5 years later.

What is the sum of my siblings ages?

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ANSWER

8 + 17 = 25.