若x:y:z=3:4:5 x+y+z=24 求x,y,z的值
若x:y:z=3:4:5且x+y+z=24,求x、y、z的值
若X:y:Z=3:4:5,且X+Y+Z=24,求X、Y、Z的值
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
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.
若X.Y.z满足2X+3Y+z=18,4X-3Y+5z=24,求X+3Y的值
x y z x+y--- = --- = ---- ----y+Z z+x x+y ,求 z 的值 .求 x+y----
若x/2=y/3=z/4不等于0,求x+y+z/x+y-z的值
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
若x:y:z=2:3:4,求x+y+z/x-2y+3z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.