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7. If 99x+101y= 1499 101x+99y = 1501, then x= |
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Answer» adding 1st and 2ND EQUATION 200x + 200y = 3000X + y = 15.......(3)SUBTRACT 1st equation from 2nd2x - 2Y = 2x - y = 1...........(4)now adding 3rd and 4th equation 2x = 16x = 8. |
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