document.write( "Question 98726: How many ordered pairs (x,y) of
\n" ); document.write( "integers satisfy…
\n" ); document.write( "(1/X)+(1/Y)=(1/2)
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Algebra.Com's Answer #71855 by Nate(3500)\"\" \"About 
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1/x + 1/y = 1/2
\n" ); document.write( "xy/x + xy/y = xy/2
\n" ); document.write( "y - xy/2 + x = 0
\n" ); document.write( "y(1 - x/2) + x = 0
\n" ); document.write( "y(2 - x)/2 = -x
\n" ); document.write( "y = -2x/(2 - x)
\n" ); document.write( "Infinite ordered pairs ... excluding x = 2 and x = 0
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