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Simultaneous Settlement (Posted on 20120127) 

Without solving for x and y, determine all possible values of x*y in this simultaneous equation:
x+x*y = 8 and, y+x*y = 9
Note: Solving for 1/x, 1/y, x or y is similarly NOT allowed.
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Submitted by K Sengupta

Rating: 5.0000 (1 votes)


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 Comment 7 of 8 

x+x*y = 8 and, y+x*y = 9 x + x*y + 1 = y + x*y y = x + 1 x*y = x(x+1) (parabola)

Posted by Benny
on 20120128 15:35:50 


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