已知x:2=y:3=z:0.5,则x+3y−z2x−y+z的值是( )
已知x:2=y:3=z:0.5,则x+3y−z2x−y+z的值是( )
已知x^3+y^3-6x+2y+z+3+10=0,求(x-y+z)(x+y-z)的值.(z+3)是绝对值
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z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,z属于R+(正实数),且xyz(x+y+z)=4+2*根号下3,则(x+y)(y+z)的最小值是?
已知|x+(-2)|+|y+3|+|z|=0,求x+y+z的值.
已知2x=3y=4z求2x-y+z分之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/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{x:y:z=1:2:3,x+y+z=12,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