若x:y:z=2:3:5且2x+3y-z=16,求x,y,z分别等于多少? 求过程!
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
200分求数学题,急x+y-z=-14x-3y+2z=162x-2y-3z=5求z等于多少
若三分之x等于四分之y等于5分之z且x+2y+3z=52,求x+y+z=_____
若 x/2等于y/3等于z/4,且x+y-z=5 求xyz的值
X+Y+Z=200,1/3X+4Y+5Z=200,求X,Y,Z等于多少?
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z均不为0,求3x*x+2y*y+5z*z/5x*x+y*y-
已知3x-2y-5z=0,2x-5y+4z=0,且x,y,z都不为0,求(3x*x+y*y+4z*z)/(5x*x+y*
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
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.