解方程组:2x+2y+z=1 x-2y-3z=-13 3x+2y+5z=11
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-2y+z=-1,x+y+z=2,x+2y+3z=-1
解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2.
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解下列方程组(1)3x-y+z=3 2x+y-3z=11 x+y+z=12(2)5x-4y+4z=13 2x+7y-3z
解方程组:2x+2y+z=1 x-2y-3z=-13 3x+2y+5z=11
帮我解方程组:3x-y+z=3,2x+y-3z=11,x+y+z=12.x=?y=?z=?
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
方程组x=2y=3z x+y+z=11的解
方程组{x=2y=3z x+y+z=11 的解是