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The total cost of 6 books and 7 pens is 79 rupees and the total cost of 7 books and 5 pensis 77 rupeess. Find the cost of 1 book and 2 pens. |
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Answer» Step-by-step explanation: let the number of books Be X let the number of pens be y according to question 6 X + 7 y is equals to 79 rupees------1 7 x + 5 y is equal to 77 rupees-------2 multiply equation 1 by 5 30 X + 35 y is equals to 395 rupees----3 multiplying equation 2 by 7 49 X + 35 y is equal to 539----4 substrating 1 from 2 19x=144 x=7.58 rs I feel that the question is wrong because x is not coming in whole no.. |
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