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If the price of 6 books and 7pens is 79rs. and 7 books 5pens is 77rs. then find the cost of 1book and 2pen. |
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Answer» Answer: 6 books+7pens=79 7books+5pens=77 let BOOK and DETERMINE be X and y so,6x+7y/7x+5y=79/77 77(6x+7y)=79(7x+5y) 462x+539y=553x+395y 539y-395y=553x-462x 144y=91x y=91x/144 |
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