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The cost of 4 pens and …

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The cost of 4 pens and 4 pencils boxes is rs 100 3 times the cost of a pen is rs 15 more than the box . From the pair of linear equation for the above eqn . Find the cost of pen and pencil box

Posted by Tanu Chouhan 7 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Varun Kumar 7 years, 4 months ago

Let the cost of pens=x ...cost of pencils be Y 4x +4y = 100 Or x + y =25...........(1) 3x = 15 + Y 3x -Y =15...............(2) Adding both eq ..we get 4X =40 X=10. Putting x =10 in eq 1 we get Y=15

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CBSE > Class 10 > Mathematics