Ta có;\(\frac{1}{x}+\frac{1}{y}+\frac{1}{2xy}=\frac{1}{2}\)
\(\Rightarrow\frac{2y}{2xy}+\frac{2x}{2xy}+\frac{1}{2xy}=\frac{xy}{2xy}\)
\(\Rightarrow2.y+2x+1=xy\)
\(\Rightarrow2x+1=y.\left(x-2\right)\)
\(\Rightarrow2.\left(x-2\right)+5=y.\left(x-2\right)\)
\(\Rightarrow\left(2-y\right).\left(x-2\right)=5\)
Bn kẻ bảng nha