x-y-5z=4,2x+y-3z=10,3x+y+z=8解方程组

解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 x-y-5z=4,2x+y-3z=10,3x+y+z=8解方程组 解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8 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{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7. x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组. 已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z 已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=—— 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：x+y+z=6,y-z=4,x-y-2z=3,