咯X/3=y/4=z/5,且3x-2y+z=18.求z+5y-3z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
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.
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4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z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+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值