若3x+7y+z=5,4x+lOy+z=3,则x+y+z的值等于______
若2x+5y+4z=0,3x+y-7z=0,则x+y-z的值等于( )
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
已知2x+5y+4z=15,7x+y+3z=14,则4x+y+2z的值为______.
若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于【】
若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于( )
若4x=7y+5z,2x+y=z,则x:y:z的值为
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:y:z=3:4:6,则x-y+z分之x+y-z的值为?
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?