Question 1095931

the total cost of 2 books and 7 pens is 79 rs and the total cost of 7 books and 5 pens is 77 rs. find the cost of1 book and 2 pens... 
<pre>{{{highlight_green(matrix(2,5, 1, "book:", about, rs, 3.69, 2, "pens:", about, rs, 20.46))}}}