解:x/4 + y/3 =4/3......... (1) 3 * ( x - 1)=4 *(y+2)............(2) (1)式两边同乘 12 得: 3x +4y =16.......(3) (2)式化简得 : 3x - 4y = -5........(4) (3) + (4) 得:6x =11 , x=11/6故:y=11/8