3 books and 10 pens together cost Rs 300. 2 books and 3 pens together cost Rs 145. Find the cost of 1 book and 3 pens.

The total cost of 8 books and 5 pens is Rs 420 and the total cost of 5 books and 8 pens is Rs 321. Find the cost of 1 book and 2 pens.

The total cost of 5 books and 7 pens is 79 rupees and the total cost of 7 books and 5 pens is 77 rupees . Find the cost of 1 book and 2 pens.

3 pencils and 4 pens cost Rs. 270 while 4 pencils and 3 pens cost Rs. 150 . Find the combined cost of one pencil and one pen.

The cost of 2 books and 6 note books is Rs. 34 and the cost of 3 books and 4 note books is Rs. 31. Using the matrices, find the cost of one book and one note-book

The cost of 4 pencils, 3 pens and 2 books is Rs.150. The cost of 1 pencil, 2 pens and 3 books is Rs.125.The cost of 6 pencils , 2 pens and 3 books is Rs. 175. Find the cost of each item by using matrices.

The sum of the costs of one book each of Mathematics, Physics and Chemistry is Rs 210. Total cost of a mathematics book, 2 physics books, and a chemistry book is Rs. 240/- Also the total cost of a Mathematics book, 3 physics book and 2 chemistry books is Rs. 300/-. Find the cost of each book using matrices.