What is the solution of the differential equation\[(x+y)(dx-dy)=dx+dy\

1.	What is the solution of the differential equation\[(x+y)(dx-dy)=dx+dy\]?
A.	\[x+y+ln\,\,(x+y)=c\]
B.	\[x-y+ln\,\,(x+y)=c\]
C.	\[y-x+ln\,\,(x+y)=c\]
D.	\[y-x-ln\,\,(x-y)=c\]
Answer» D. \[y-x-ln\,\,(x-y)=c\]

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What is the solution of the differential equation\[(x+y)(dx-dy)=dx+dy\]?

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