Question

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 will be represent this situation algebraically and graphically​

Answer 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