﹛x+y+z=12﹛x+2y-z=6﹛3x-y+z=10
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
x+2y+3z=12x+3y+z=23x+y+2z=3
x+y−2z=52x−y+z=42x+y−3z=10
2x+y+3z=383x+2y+4z=564x+y+5z=66
若x+2y-4z=0 3x+y-z=0 求x:y:z
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
十万火急!4x-9z=17 3x+y+15z=18 x+2y+3z=
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
(y-x)/(x+z-2y)(x+y-2z)+(z-y)(x-y)/(x+y-2z)(y+z-2x)+(x-z)(y-z
已知2x+2y+z=0,5x+4y-4z=0,求3x平方-4y平方+5z平方/x平方+6y平方-10z平方的值
已知x+2y+z=0,5x+4y-4z=0,求x平方+6y平方-10z平方/3x平方-4y平方+5z平方的值
1.x+y=16,y+z=12,z+x=102.3x-y+z=4,2x+3y-z=12,x+y+z=63.x+y+z=6