2x+2y+3z=10且x+3y+5z=1 求2z+y-x的值
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
已知x:y:z=2:3:4,且x-y+z=36,求x+y+z的值.
已知x:y:z=2:3:4,且x+y+z=18,求x,y,z的值
已知方程2x+2y+3z=10且x+3y+5z=1,求2z+y-x的值
2x+2y+3z=10且x+3y+5z=1 求2z+y-x的值
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
已知x=y/3=z/5.且x+y-2z不等于0.求2x+3y-z/x+y-2z的值是多少
已知x+y/2=y+z/3=z+x/4,且x+2y+z=12,求x-2y+z的值
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.