(Here we have an idea about mother’s age that she is 25 years
older

then her son, but we don’t have any idea about her son’s age)

So Let the son’s present age be x year’s.

Mother is 25 years older than her son (x + 25) years

After 8 years son’s age to mother’s age will be 4/9

Son’s age = (x + 8)

Mother’s age = (x + 25 + 8) = (x + 33)

x + 8 = 4

x + 33 9

(x + 8) X
9 = (x + 33) X 4

9x + 72 = 4x + 132 = 9x = 4x + 132 – 72

9x = 4x +
60 = 9x – 4x =
60 = 5x = 60 = x =
60/5

x = 12

Therefore son’s age is 12 years

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