【黃詠翔】評論
(y=1/5x)→(-1/5x+=0)(5x-y=5)-[(-1)*(-1/5x+y=0)]→(5x-y=5)-(1/5x-y=0)→24/5x=5→x=(24/5)/5→x=25/24 y=(1/5)*(25/24)y=5/24a=25/24 b=5/24a+b=(25/24)+(5/24)=30/24=5/4