若y:x:z:=5:3:8,且7x+3y-5z=8,则x= y= z=
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
若y:x:z:=5:3:8,且7x+3y-5z=8,则x= y= z=
若y:x:z=5:3:8,且7x+3y-5z=8,则x.y.z分别是多少?
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+3y+5z=10,5x+z+3y=8,x+y+z=?
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
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
x/2=y/3=z/5 x+3y-z/x-3y+z
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
2x+3y-z=11 2x+y-5z=8 -2+7y+z=19
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai