19X+4Y=65 Z+11Y=97 6X+3Z=45方程组解

解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8 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 解三元一次方程组：x+y+z=6,y-z=4,x-y-2z=3, 解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18 解方程组{6x=4y=3z,2x+y+z=22 解方程组6x=4y=3z,x+y+z=18 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{2x+3y+z=11,x+y+z=0,3x-y+z=-2. 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.