Question

9x+2Y=42,4x-Y=13 by elimination method​

Answer 1

Answer:

Let the present age of Aftab = x

And, present age of his daughter is represented as = y

Seven years ago,

Aftab’s age = x – 7

Age of Aftab’s daughter = y – 7

According to the question,

(x – 7) = 7 (y – 7 )

x – 7 = 7 y – 49

x – 7y = – 49 + 7