设x:y:z:=2:3:5,且满足3x-3y+z=4,求2x+3y-4z的值?
设K法解, 已知x : y : z =3 : 4 : 5 且2x+3y+z=46,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满足方程组:4x-5y+2z=o;x+4y-3x=0,求x:y:z的值
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知x+y/2=y+z/3=z+x/4,且x+2y+z=12,求x-2y+z的值
若X.Y.z满足2X+3Y+z=18,4X-3Y+5z=24,求X+3Y的值
已知x,y,z满足3x+7y+z=5 4x+10y+z=3 求x+y+z的值
已知x、y、z满足{3x+7y+z=5 ,求x+y+z的值 {4x+10y+z=3
已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0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