(2x-1)/5+(3y-2)/4=2 两边乘208x-4+15y-10=408x+15y=54(1)(3x+1)/3-(3y+2)/4=4/3两边乘1212x+4-9y-6=1612x-9y=184x-3y=6(2)(1)+(2)×58x+15y+20x-15y=54+3028x=84x=3y=(4x-6)/3=2