5x=3y=2z,求x：y：z

已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z x+2y=3x+2z=4y+z 求x:y:z 设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值 x+y+z=35 2x-y=5 y/3=z/2 求x,y,z 已知z、y、z同时满足x+3y-5z=0,2x-y-3z=0,求x:y:z 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值 x/2=y/3=z/5 x+3y-z/x-3y+z 3x-y=-7,y+2z=2,2x-2z=-5 求x,y,z 2x+y-z=3 5x+3y-z=10 求x+y+z= x+y-z=5,2x+3y+z=10,x-2y-z=20求方程组 2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~ 2分之x=3分之y=5分之z x+y+z=20 求x,y,z 已知{x-5y+2z=0 3x-5y-4z=0,求x：y:z 若x/3=y/4=z/5,求x+y+z/3x-2y+z的值. x/3=y/4=z/5,求x+y+z/3x-2y+z的值, x+2y+3z=20,x+3y+5z=31,求x+y+z的值