若x+y+4z=10,4x+4y+z=15,则x+y+z的值是
若x+y+4z=10,4x+4y+z=15,则x+y+z的值是
若4x=7y+5z,2x+y=z,则x:y:z的值为
若x:y:z=3:4:6,则x-y+z分之x+y-z的值为?
已知4X=7Y+5Z,2X+Y=Z,那么X:Y:Z的值是?
若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
5,若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
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
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/2=y/3=z/4不等于0,求x+y+z/x+y-z的值