Pravin tells his daughter 7 year ago I was 7 times as old as you were then also 3 years from now I sell be 4 times as old as you w

1 thought on “Pravin tells his daughter 7 year ago I was 7 times as old as you were then also 3 years from now I sell be 4 times as old as you w”

1. Answer:

   Pravin is 77 years and his daughter is 17 years old.

   Step-by-step explanation:

   Let age of Pravin be x

   Let age of his daughter be y

   1st condition:

   x – 7 = 7(y – 7) x-7 because 7 years ago

   x – 7 = 7y – 49

   x – 7y = -49 + 7

   x – 7y = -42 eq. 1

   2nd condition:

   x + 3 = 4(y + 3)

   x + 3 = 4y + 12

   x – 4y = 9 eq. 2

   comparing equations 1 and 2

   x – 7y = -42

   x – 4y = 9 subtract them

   ————-

   -3y = -51

   y = 17

   Substitute y in eq. 1

   x – 7(17) = -42

   x = -42 + 119

   x = 77

   Reply