Sanjeev is twice as old as his son. if after four years he will be four times as old as his son was 9 years ago, how old is each now?
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Let age of son be x years
Sanjeev age vl be 2x
After 4 years ages vl be x+4 and 2x+4
2x+4 = 4(x-9)
-2x=- 40
X= 20 son age
Y= 2*20= 40 sanjeev age
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