若-x/2=y/3=z/4=3则3x+4y+6z的值为
若x:y:z=3:4:6,则x-y+z分之x+y-z的值为?
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4x-3y-6z=0,x+2y-7z=0,且x、y、z都不为0,求(3x+2y+z)/(x+2y+3z)的值 快帮求
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
若x/3=y/4=z/5,则x+2y+3z/2x的值为
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值
若x:y:z=2:3:4,求x+y+z/x-2y+3z的值
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
已知x/4=y/5=z/6,求x+y+z/3x-2y+z的值.
已知{2x+3y=z,3x+4y=2z+6 且x+y=3,则z的值为