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ICSE Class 8 Answered

I am three times as old as my son. After five years, I will be 2 1/2 times as old as my son. Find my present age and the present age of my son. 
Asked by Cl_narayan | 30 Jan, 2020, 10:30: AM
answered-by-expert Expert Answer
 
Let the present age of the Son = x then 
the present age of the father/mother = 3x 
 
Accornding to the condition, we get
begin mathsize 16px style 3 straight x space plus 5 equals space 5 over 2 open parentheses straight x plus 5 close parentheses
rightwards double arrow 6 straight x space plus space 10 space equals space 5 straight x space plus space 25
rightwards double arrow straight x space equals space 15
3 straight x equals 3 left parenthesis 15 right parenthesis space equals space 45 space end style
 
Therefore the present age of the Son is 15 years and the present age of the father/mother is 45 years.
Answered by Yasmeen Khan | 30 Jan, 2020, 11:46: AM
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