Question

1/2x - 1/2y=1 solución

Answer 1

1/2x-1/2y=1

2y-2x=1
-------
(2x)(2y)

2(y-x)/4xy=1
(y-x)/2xy=1
y-x=2xy
y=2xy+x 
y=x(2y+1)
y/2y+1=x