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, we need to set up a system of equations based on the information provided about the costs of erasers, pencils, and pens. Let's denote:

- The cost of one eraser as \( X \)
- The cost of one pencil as \( Y \)
- The cost of one pen as \( Z \)

From the problem, we can derive the following equations:

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