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Question

5 pencils and 7 pens together cost Rs. 50, whereas 7 pencils and 5 pens together cost Rs. 46. Find the costs of one pencil and one pen.


Solution

Let the cost of one pencil be x and that of one pen be y

5 x + 7 y = 50

7 x + 5 y = 46

On solving the equations,

x= 3, y = 5

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