{ x+y+z=7 x+2y=4 z=3x-2y 解方程组
解方程组:2x+3y+4z=20,x+y+z=7
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
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.
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
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
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
解方程组:{x/2=y/3=z/4 2x+y+z=22
解方程组:x+2y+3z=80,x/2+y/3=z/4,
x/2=y/3=z/4 x+y+z=18 求方程组解
解方程组{6x=4y=3z,2x+y+z=22