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Question

The number of integral solutions (x,y) of the equations xy+yx=20 and xx+yy=65 is :

A
0
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B
1
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C
2
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D
None of these
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Solution

The correct option is C 2
By trial and error method
Put x=16,y=1
in the same way x=1,y=16
The equation gets satisfied

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