Question

five books and seven pens together cost RS 79 whereas 07 books and 05pens together cost RS 77. Represent this situation in the form of linear equation in two variables.

Answer 1

5x+7y=79
7x+5y=77
....................

Answer 2

let the cost of each book be X and cost of each pen be rupeesY
5x+7y =79
7x+5y =77