r2+2r1,r3+r1,r5-2r11123001600260-32301-1-2r4+3r511230016002600-1-301-1-2r3-2r2,r4+r211230016000-6000301-1-2r3+2r4112300160000000...
1?真的错了.不好意思,重来r2+2r1,r3+r1,r5-2r11123003900260-32301-1-2r2*(1/3),r4+3r511230013002600-1-301-1-2r3-2r2,r4+r2,r5+r211230013000000000101交换行11230101001300000000