解方程组x+y-z=0,2x+y+z=7,x-3y+z=8
解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2.
如何解方程组(x+2y)(x+2z)=-16,(y+2z)(y+2x)=8,(z+2x)(z+2y)=-7
已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=——
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
解方程组:x:y:z=4:7:8,x+y+2z=54
解方程组:2x+3y+4z=20,x+y+z=7
已知x、y、z满足方程组:x+y-z=6;y+z-x=2;z+x-y=0 求x、y、z的值
解三元一次方程:x+y-z=0,2x+y+z=7,x-3y+z=8
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
解方程组2x+y-z=7 x+y+z =1 2x-y-z=5
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