5 pencils and 7 pens together cost Rs.195. While 7 pencils and 5 pens together cost Rs. 153. Find the cost of each pencil and the pen.
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Expert's answer
2013-07-09T09:41:39-0400
Let x is the cost of each pencil, and y is the cost of each pen. Then 5x + 7y = 195 and 7x + 5y = 153. Solve this system of equations. 35x + 49y = 1365 35x + 25y = 765
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