③解方程组：｛x-3y=0 x²-8y²-6y+5=0

③解方程组：｛x-3y=0 x²-8y²-6y+5=0
③解方程组：｛x-3y=0 x²-8y²-6y+5=0

③解方程组：｛x-3y=0 x²-8y²-6y+5=0
x=3y代入第2个方程得：9y^2-8y^2-6y+5=0,即(y-5)(y-1)=0
解得y=5,1,
故x=15,3
因此有两个(15,5),(3,1)