x+y+z=1,5x-2y=1,6x+y=8解方程组

解方程组2x+y-z=7 x+y+z =1 2x-y-z=5 解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值 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 解方程组；1.x+y+z=26,x-y=1,2x-y+z=18 2.5x+y+z=1,2x-y+2z=1,x+5y-z= 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x+y-z=-5,x-y-z=1,x-y+z=15 方程组x-y-z=5 y-x-z=1 z-x-y=-15的解是? 怎样解三元一次方程组(1)x+y-z=11,y+z-x-5,z+x-y=1 解方程组2x+y+x=10 x+2y+z=-6 x+y+2z=8 解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18 解方程组:{3x+2y+2z=-1 4x-3y-5z=12 2x+6y+7z=-1