解方程组 x-2y-z=1 x+4y+3z=1 x+4y+z=5
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解三元一次方程组1、x+y-z=4 2x-y+z=5 x-3y+z=-2 2、y+2z=-2 3x+y-4z=1 2x-
解三元一次方程组1)2x+y-3z=3,3x-y+2z=1,x-y-z=5 2)x:y=3:2,y:z=5:4,x+y+
解三元一次方程组:(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y
解三元一次方程组:5x+y+z=1(1) 2x-y+2z=1(2) x+5y-z=-4(3) 急
解三元一次方程组 5x+2y-4z=1,3x-3y+2z=1,-2x+3y-2z=0
解三元一次方程组 {3x-5y+6Z=4, 3x-2y+2Z=3, -3x-3y+5z=-1
解三元一次方程组:{3x-5y+2z=1 {4x+5y-z=5 {x-5y+3z=-2
解方程组:{3x+2y+2z=-1 4x-3y-5z=12 2x+6y+7z=-1
解方程组,{x+3y-2z=-9,2x-y+z=1,4x-3y-5z=-3;
解三元一次方程组:5x+4y+z=0,3x+y-4z=1,x+y+z=-2
方程组x+2y+3z=6 3x-y-z=1 4x+5y-7z=2的解