The sum of cost of 5 eraser, 3 pencil and 1 pan is Rs. 16. The sum of cost of 2 eraser, 1 pencil and 3 pen is Rs. 19. While the cost of 1 eraser, 2 pencil and 4 pen is Rs. 25. Find cost per unit of eraser, pencil and pen.

Explanation

To solve the problem of finding the cost per unit of eraser, pencil, and pen, we can set up a system of linear equations based on the information provided. Let's denote:

- \( x \) = cost of one eraser
- \( y \) = cost of one pencil
- \( z \) = cost of one pen

From the problem statement, we can derive the following equations:

...