$\frac{x}{8}$- $\frac{1}{4}$= $\frac{1}{y}$ => $\frac{x}{8}$-$\frac{2}{8}$=$\frac{1}{y}$ => $\frac{x-2}{8}$=$\frac{1}{y}$ =>$y(x-2)=8$
$\left \{ {{y=1} \atop {x-2=8}} \right.$ =>$\left \{ {{y=1} \atop {x=10}} \right.$
$\left \{ {{y=-1} \atop {x-2=-8}} \right.$ =>$\left \{ {{y=-1} \atop {x=-6}} \right.$
$\left \{ {{y=4} \atop {x-2=4}} \right.$=> $\left \{ {{y=4} \atop {x=6}} \right.$
$\left \{ {{y=-4} \atop {x-2=-4}} \right.$ =>$\left \{ {{y=-4} \atop {x=-2}} \right.$
$\left \{ {{y=2} \atop {x-2=4}} \right.$ =>$\left \{ {{y=2} \atop {x=6}} \right.$
$\left \{ {{y=4} \atop {x-2=2}} \right.$ =>$\left \{ {{y=4} \atop {x=4}} \right.$
Trường hợp: y=-2 và x-2=-4; y=-4 và x-2=-2 (làm hộ mình nhé!
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