若x+y=-5,x+z=3,则(y+z)-(3-2x)的值为?
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?
若x/3=y/4=z/5,则x+2y+3z/2x的值为
已知x、y、z满足2x+3y+z=48 x-2y+2z=56 3x+5y+3z=52 则x+y+z的值为多少 急
5,若x+2y+3z=10,4x+3y+2z=15,则x+y+z的值为( )
若x:y:z=3:5:7,3x+2y-4z=9,则x+y+z的值为( )
若5分之x=4分之y=3分之z(z不等于0),则3x-2y分之x+y+z的值为
若2x+5y-4z=0,3x+9y-7z=0,则x+y-z的值为
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
x=2,y=-3,z=3则表达式x||y+z&&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________.
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