x/3-y/2=6/5
x/2-y/3=10/9
相加得
(5/6)(x-y)=104/45
x-y=208/75 ①
相减得
(1/6)(x+y)=-4/45
x+y=-8/15 ②
①+②得
2x=168/75
x=84/
带入得
y=-92/75