Question

If fathers age is x and daughters age is y, after how many years will the father be twice his daughters age??

Answer 1

After x - 2y years father be twice his daughters age

Step-by-step explanation:

Fathers age  = x

daughters age = y

Let say after N years father will be twice his daughter age

then  (x + N) = 2(y + N)

=> x + N = 2y + 2N

=> N = x - 2y

After x - 2y  years father be twice his daughters age

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