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My mother was 6 and 36. A few years ago, my mother was nine times older than me.
Suppose that x years ago, my mother was nine times my age, then

36-x=9*(6-x)

36-x=54-9x

8x=54-36

x= 18/8

x=2.25(9/4)

The answer is not an integer, there is something wrong with the data you gave!

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