由2x-3y-2=0得x=（3y+2）/2,将x=（3y+2）/2代入（2x-3y+5）÷7+2y=9得y=4将y=4代入x=（3y+2）/2得x=7给分吧
2x-3y=2(2+5)÷7+2y=9，y=4所以：x=7
2x-3y-2=02x-3y＝2（2x-3y+5）÷7+2y=9（2+5）÷7+2y=91+2y=92y=8y=42x-12-2=02x=14x=7
