若2/x=3/y=5/z,且3x+2y-z=14,求x,y,z值

若2分之x+y=3分之y+z=5分之x+z 且x+y+z=18 求x,y,z的值 设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值 若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y:z 若(4x-3y-3z)^2+|x-3y-z|=0 且xyz不等于0 则4x+y-z/x+y+z 的值 三元一次方程组题目x+y-z=11 y+z-x=5 x-y+z=1x+y=4 y+z=3 x+z=5若已知x-3y+2z=0 2x+3y-8z=0, 且xyz≠0,则x:y:z= 已知xyz不等于0,且{x+3y+5z=0 x2+3y+z=0,则x.x+y.y-2z.2z/3x.3x+2y.2y+z.z=? 若x:y=2:3,y:z=1:2,且x+y+z=55,则y=? X:y:z=2:3:5且x+2y=10求X+y+2z的值 x/2=y/3=z/5 x+3y-z/x-3y+z 若x+y+z=3y=2z,则x/x+y+z=? 如果x/2=y/7=z/5,且x*y*z不等于零,则(x+y+z)/(3x-y)=______. 若x：3=y：4=z：5,且3x-2y+2z=18,则2x+5y-3z=多少 若(x-3):(y+4):(2 z+3)=2:3:5 且3x-2y+z=23.则x:y:z=______ 若x/2=y/3=z/4,且3x-2y+5z=-20,则x+3y-z=? 若x/2=y/3=4/z,且3x-2y+5z=-20,则x+3y-z= 若x/2=y/3=z/4,且3x-2y+5z=-20,则x+3y-z=? 若x/2=y/3=z/4,且3X-2y+5z=20,求X+3y-z 若x:y:z=2:7:5,且x-2y+3z=6,则x= ,y= ,z=