解方程组x-y+z=-1,2x+y-z=-1,3x-2y-2z=-9
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
解方程组:x-2y+z=-1,x+y+z=2,x+2y+3z=-1
解方程组{x:y:z=1:2:3 {2x+y-3z=15
解二元一次方程组X:Y:Z=1:2:3,X+Y+Z=12
解三元一次方程组x:y:z=1:2:3 x+y+z=36
解方程组2x+y-z=7 x+y+z =1 2x-y-z=5
解方程组1、4x+9y=12,3y-2z=1,2x+6z=32、3x-y+2z=3,2x+y-3z=11,x+y+z=1
解方程组x+2y-z=1 ,3x-3y+z=2,2x+3y+z=7和方程组x+y=-14,y+z=-7,x+z=19
三元一次方程组数学题x+2y+2z=33x+y-2z=72x+3y-2z=10x-y=2z-x=3y+z=-1x-y-z
解三元一次方程组x:y=2:1,2x-y=3z,x+y+z=20
解方程组x-2y=-9 y-z=3 2z+x=47
求方程组 {x+y-z=1 2x+3y-z=13