将此矩阵化为标准阶梯形矩阵

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r5+r4, r2+2r1,r3-3r1,r4+4r1
1 0 1 00 1 5 70 -1 -3 3
0 1 1 10 -2 -2 -2
r2-r4,r3+r4,r5+2r4
1 0 1 00 0 4 60 0 -2 40 1 1 10 0 0 0r3*(-1/2),r1-r3,r2-4r3,r4-r3
1 0 0 20 0 0 140 0 1 -20 1 0 30 0 0 0r2*(1/14),r1-2r2,r3+2r2,r4-3r2
1 0 0 00 0 0 10 0 1 00 1 0 00 0 0 0交换行1 0 0 00 1 0 00 0 1 00 0 0 10 0 0 0