Question

five books and 7 pens together cost Rs 79 where 7 book and 5 pens together cost rupees 77 represent the situation in the form of linear equation in two variables

Answer 1

Answer:

Let book cost=x

Let pen cost = y

Therefore we have,

5x+7y=79 (i)

7x+5y=77 (ii)

Thus the situation can be represented in linear eq. in two variables, Eg-

1) 5x + 7y = 79

2) 7x + 5y = 77

Answer 2

let the number of pens be 'x' and number of books be 'y'

7x+5y=79. …eq 1
5x+7y=77… eq2