Uncle Yan is different from my nephew. (44-x)-x=44-2x years old.
One year when Uncle Yan was X years old, my nephew x-(44-2x)=3x-44.
Judging from the meaning of the question.
x=(3x-44)*4
1 1x=44*4
x= 16。
44- 16=28
Answer: Uncle Yan is 28 years old and nephew 16 years old.
Hope to adopt it and wish you progress in your study.