2x-y+3z=3 3x+y-2z=-1 x+y+z=5解方程组
解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3
解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3
解方程组:x-2y+z=-1,x+y+z=2,x+2y+3z=-1
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
x:y:z=2:3:5解方程组 2x+3y-z=16
解方程组{x:y:z=1:2:3 {2x+y-3z=15
解方程组:x+3y=5.y-2z=5.x+z=5
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+3y+z=11,x+y+z=0,3x-y+z=-2.
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}