方程组x+y-z=6 x-3y+2z=1 3x+2y-z=8

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{3x+y-z=4,2x-y+3z=12,x+y+z=6} 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 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 已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少 4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于 解三元一次方程组：x+y+z=6,y-z=4,x-y-2z=3, 三元一次方程组2x+z=3 3x+y-z=8 x+3y+2z=3 5x+2y-3z=2 x+2y+z=6 7x-2y-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= 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 已知x、y、z满足方程组：x+y-z=6；y+z-x=2；z+x-y=0 求x、y、z的值