解方程：Y+Z-3X=3 Z+X-3Y=5 X+Y-3Z=6

解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6 解方程:x+2y+3z=8 x+3y+5z=6 解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y x/2=y/3=z/5 x+3y-z/x-3y+z 已知2x+3y+z=130,3x+5y+z=180,试求x+2y/z+y+z【在线等高手解方程】 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) 3x-y+z=3 2x+y-3z=11 x+y+z=12 解方程 解方程：{2x+3y+z=7,x+y+z=4,3x+y-z=-4 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x：y：z的值 已知3X=4X,5Y=6Z求X+Y：Y+Z 3x-5y-6z=4,2x-2y-3z=5 2x-3y-4z=4 解方程,