2x+3y-4z=-7,(x-4z)÷3=(2y+3z)÷2=2,求X,Y,Z的值

已知：4x-3y-6z=0,x+2y-7z=0.求出x-y+z÷x+y+z=? 已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=—— x+2y=3x+2z=4y+z 求x:y:z x+y/2=z+x/3=y+z/4 x+y+z=27 2x+3y-4z=-7,(x-4z)÷3=(2y+3z)÷2=2,求X,Y,Z的值 2x+z=10 x+y-z=4 3x-y-z=0 解方程：{2x+3y+z=7,x+y+z=4,3x+y-z=-4{2x+3y+z=7,x+y+z=4,3x+y-z=-4要过程 x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, x：y：z=3:4:7 2x-3y+z=18 求：3x-2y+z 2x+5y+4z=6,3x+y-7z=-4,x+y-z=? 已知2x+5y+4z=6 3x+y-7z=-4求x+y-z 已知4x-3y-6z=0 ① ,x+2y-7z=0 ②,且x,y,z均不为0,求3x+2y+z÷x+2y+3z的值 已知4x-3y-6z=0 ① ,x+2y-7z=0 ②,且x,y,z均不为0,求3x+2y+z÷x+2y+3z的值 x+2y+4z=17 2x+y+z=7 3x+y+2z=11 X-Y-Z=0 X+Y-3Z=4 2X-5Y+7Z=21 3x+7y+4z=35,x+5y+2z=40,x+y+z=( ) {x+y+z=1 {x+3y+7z=2 {x+5y+19z=4 5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z