2x+5y=8.①
3x+2y=5.②
①X3-②X2得:
6x+15y-6x-4y=24-10
11y=14
y=14/11 .带入②,得:
3x+2×14/11 =5
3x=55/11-28/11
3x=27/11
x=9/11