A = 1 2 1 -13 6 -1 -35 10 1 -5r2-3r1, r3-5r11 2 1 -10 0 -4 00 0 -4 0r3*(-1/4)1 2 1 -10 0 1 00 0 -4 0r1-r2, r3+4r21 2 0 -10 0 1 00 0 0 0基础解系为: (-2, 1, 0, 0)', (1,0,0,1)'.