3X+7Y+Z=5,4X+8Y+2Z=3,则X+Y+Z的值为
若4x=7y+5z,2x+y=z,则x:y:z的值为
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知2x+5y+4z=15,7x+y+3z=14,则4x+y+2z的值为______.
若x:y:z=3:5:7,3x+2y-4z=9,则x+y+z的值为( )
若2x+5y-4z=0,3x+9y-7z=0,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?
C语言:int x=5,y=7,z; z=x>y?5>3?++x+y:x:++x-y++ 则z的值为________.
1.x+y+z=30,3x+y-z=50,x,y,z为非负数,求5x+4y+2z取值范围.
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
已知x/4=y/5=z/6,求x+y+z/3x-2y+z的值.