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7x-2y/xy = 5 .....(i) 8x+7y/xy=15 ....(ii)

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7x-2y/xy = 5 .....(i) 8x+7y/xy=15 ....(ii)

Posted by उत्सव राज 4 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

A K47 4 years, 10 months ago

i)7x-2y/xy =5 =7x/xy - 2y/xy =5 =7/y - 2/x =5 ii)8x+7y/xy =15 =8x/xy+7y/xy=15 =8/y+7/x=15 Let 1/x=p and 1/y=q then by substituting these values we get, 7q-2p=5 and 8q+7p=15 By eliminating, q=1 and p=1; We know that 1/x=p and 1/y =q then by putting values of q and p we get x=1 and y =1.

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CBSE > Class 10 > Mathematics