七点之前交答案4解下列方程3x-y+z=3{ 2x+y-3z=11x+y+z=125x-4y+4z=13{2x+7y-3
七点之前交答案4解下列方程3x-y+z=3{ 2x+y-3z=11x+y+z=125x-4y+4z=13{2x+7y-3
1.解下列方程(1)(x+y=-2(x+z=13(y+z=1(2)(x-y-z=-1(3x+5y+7z=11(4x-y+
解下列方程组(1)3x-y+z=3 2x+y-3z=11 x+y+z=12(2)5x-4y+4z=13 2x+7y-3z
解下列方程x+2y-z=0 2x-3z=1 3x-y+2z=4 我怎么算出两种答案啊
解下列方程{2x-y+3z=-13 3x+2y-z=4 x-z=2
1.解下列方程组,①y-2z=1,x+3z=-1,3x-5y+z=21.②x+y+2z=7,x-2y-z=-4,2x+3
解下列三元一次方程组:(1)x-z=4,x+y-z=-1,2y-z=1 (2)3x+4z=7,2x+3y+z=9,x-y
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解下列三元一次方程组 1. x-4y+z=-3 2x+y-z=18 x-y-z=7 2. x:y:z=2:3:5 x+y
解下列方程x+2y-z=0 2x-3z=0 3x-y+2z=4
解下列方程组(1){y=2x-1,2x+3y+z=8,3x+2y=-4(2){x+y+z=6,x-z=2,2x-y+z=
解下列方程:x-4y=0,x+2y+5z=22,x+y+z=12