x+2y-z=3,2x-3y+2z=5,x+y=5解方程组

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：x+y+z=4,x+y+2z=5,3x+y-z=6 x:y:z=2:3:5解方程组 2x+3y-z=16 解方程组：x+3y=5.y-2z=5.x+z=5 已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z 方程组3x+4y+z=14 x+5y+2z=17 2x+2y-z=3 解方程组 解三元一次方程组方程组 -x+2y+3z 2x-2y+5z=13 3x+2y+z=10 解方程组：x-2y+z=-1,x+y+z=2,x+2y+3z=-1 解方程组2x+y-z=7 x+y+z =1 2x-y-z=5 解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2. 解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}