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20. The cost of 2 pencils and 2 pens is Rs. 46whereas 3 pencils and 5 pens together cost Rs. 74.Find the cost of one pencil and that of one pen. Or |
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Answer» Put in equation formlet pencil be X and pen be y2x+2y=46....X+y=23.....*3=3x+3y=693x+5y=74subtract both the equations-2y=-5y=5/2put in 15/2+X=23x=23-5/2x=20.5 |
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