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5 pencils and 7pens together cost Rs. 50 whereas 7 pencils and 5 pens togethercost Rs. 46. Find the cost of one pencil and that of one pen. |
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Answer» Answer: LET pencil be x and let pen be y 5x+7y=50 7x+5y=46 multiply first EQUATION by 7 35x+49y = 350 multiply SECOND equation by 5 35x+25y=230 solving them we get 24y=120 which gives y is 5 RUPEES substituting in second equation we get x is 3 rupees |
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