2x+y=3 3x-y-2z=-2 x+y-z=4
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2x+y=33x-y-2z=-2x+y-z=42x+y=33x-y-2z=-2x+y-z=42x+y=33x-y-2z=-2x+y-z=4X=–3Y=9Z=-8
2x+y=3 3x-y-2z=-2 x+y-z=4
2x+y=3 3x-y-2z=-2 x+y-z=4
2x+y=3 3x-y-2z=-2 x+y-z=4
X=–3 Y=9 Z=-8
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
证明 :x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0
x/2=y/3=z/5 x+3y-z/x-3y+z
x+2y=3x+2z=4y+z 求x:y:z
x+y/2=z+x/3=y+z/4 x+y+z=27
若x+y+z=3y=2z,则x/x+y+z=?
已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值
已知实数x y z满足x/(x+1)=y/(y+2)=z/(z+3)=(x+y+z)/3,求x+y+z的值
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
已知x,y,z 大于0,x+y+z=2,求证 xz/y(y+z)+zy/x(x+y)+yx/z(z+x)大于等于2/3
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y,
分式加减的几道题目求速度1 .(x+y)²/(x-z)(y-z) - (y+z)²/(x-z)(y-z) = 2.2x+3y/x-y+2y/y-x-3y/x-y=
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
X=3z X+y+z=12 X+2y-2z=10
2x+z=10 x+y-z=4 3x-y-z=0
x+y+z=6 x+2y+3z=14 y+1=z