-(3x-2y-z)-2(4x-3(x-2y-z)-2)
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-(3x-2y-z)-2(4x-3(x-2y-z)-2)-(3x-2y-z)-2(4x-3(x-2y-z)-2)-(3x-2y-z)-2(4x-3(x-2y-z)-2)-(3x-2y-z)-2(4x-
-(3x-2y-z)-2(4x-3(x-2y-z)-2)
-(3x-2y-z)-2(4x-3(x-2y-z)-2)
-(3x-2y-z)-2(4x-3(x-2y-z)-2)
-(3x-2y-z)-2(4x-3(x-2y-z)-2)
=-3x+2y+z-2(4x-3x+6y+3z-2)
=-3x+2y+z-8x+6x-12y-6z+4
=-5x-10y-5z+4
化简-(-3x-y+2z)-{-x+【4x-(x-y-z)-3x+2z}
化简下列式子-(7X-Y-2Z)-{[4X-(X-Y-Z)-3X+Z]-X}
因式分解:z^2(x-y)-4(x-y)-3z(y-x)
x+2y=3x+2z=4y+z 求x:y:z
x+y/2=z+x/3=y+z/4 x+y+z=27
数学--整式运算4(x-y+z)-2(x+y-z)-3(-x-y-z)
已知x/2=y/3=z/4,求下列各式 (1)(x+y+z)/x (2)(x-y+2x/(x-y-2z)
2x+z=10 x+y-z=4 3x-y-z=0
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
求化简(x+3y+2z)(x-3y+6z)(x+3y+4z-2z)(x-3y+4z+2z)
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
已知4x-3y-3z=0,x-3y-z=0求(1)x:z的值.(2)x:y:z的值.
因式分解Z^2(x-y)-4(x-y)-3Z(y-z)
12x^2y^3z-8x^3y^2z+4x^2y