z=10-3x^2-3y^2ƽz=4Χ

2x+z=10x+y-z=43x-y-z=02x+z=10x+y-z=43x-y-z=02x+z=10x+y-z=43x-y-z=0x+y-z=43x-y-z=0两式相加4X-2Z=42X-Z=2Z=

x+2y=3x+2z=4y+z求x:y:zx+2y=3x+2z=4y+z求x:y:zx+2y=3x+2z=4y+z求x:y:zx+2y=3x+2z得y=x+z代入x+2y=4y+z得x+2x+2z=4

x+y/2=z+x/3=y+z/4x+y+z=27x+y/2=z+x/3=y+z/4x+y+z=27x+y/2=z+x/3=y+z/4x+y+z=27x+y/2=z+x/3=y+z/4①x+y+z=2

(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?(4x-2y-z)-{5x-[8

(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊(4x-2y-z)-{5x-

X/10=Y/8=Z/9,则X+Y+Z/2Y-3ZX/10=Y/8=Z/9,则X+Y+Z/2Y-3ZX/10=Y/8=Z/9,则X+Y+Z/2Y-3Z因为X/10=Y/8=Z/9,所以设X=10K,则

x=y/z=z/3,x+y+z＝12,求2x+3y+4z是多少,x=y/z=z/3,x+y+z＝12,求2x+3y+4z是多少,x=y/z=z/3,x+y+z＝12,求2x+3y+4z是多少,3元一次

X=3zX+y+z=12X+2y-2z=10X=3zX+y+z=12X+2y-2z=10X=3zX+y+z=12X+2y-2z=10将1式代入2、3式得：y+4z=12,2y+z=10;y+4z=12

试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2

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)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z已知

x+2y+3z=10,x-y+4z=10,x+3y+2z=2x+2y+3z=10,x-y+4z=10,x+3y+2z=2x+2y+3z=10,x-y+4z=10,x+3y+2z=2x+2y+3z=10

x+2y+3z=10,x-y+4z=10,x+3y+2z=2x+2y+3z=10,x-y+4z=10,x+3y+2z=2x+2y+3z=10,x-y+4z=10,x+3y+2z=2x+2y+3z=10

x-y+4z=10,x+3y+2z=2,x+2y+3z=11.x-y+4z=10,x+3y+2z=2,x+2y+3z=11.x-y+4z=10,x+3y+2z=2,x+2y+3z=11.x-y+4z=

x+y+z=42x+3y-z=63x+2y+2z=10x+y+z=42x+3y-z=63x+2y+2z=10x+y+z=42x+3y-z=63x+2y+2z=10X+Y+Z=4,2*(X+Y+Z)+X

4x+y+z=-32x+3y-4z=-10x+2y-z=-14x+y+z=-32x+3y-4z=-10x+2y-z=-14x+y+z=-32x+3y-4z=-10x+2y-z=-14x+y+z=-3①

x+2y+3z=10,4x+3y+2z=15则x+y+z=x+2y+3z=10,4x+3y+2z=15则x+y+z=x+2y+3z=10,4x+3y+2z=15则x+y+z=x+2y+3z=104x+

x+2y+3Z=10,4x+3y+2z=15,求x+y+z=x+2y+3Z=10,4x+3y+2z=15,求x+y+z=x+2y+3Z=10,4x+3y+2z=15,求x+y+z=x+2y+3Z=10

3x+2y+z=4x+y+z=102x+3y-z=13x+2y+z=4x+y+z=102x+3y-z=13x+2y+z=4x+y+z=102x+3y-z=11）3x+2y+z=42）x+y+z=103

x+y+2z=52x-y-z=43x+y-3z=10x+y+2z=52x-y-z=43x+y-3z=10x+y+2z=52x-y-z=43x+y-3z=10x+y+2z=5①2x-y-z=4②3x+y

2x+y+3z=10,3x+4y+2z=15,则x+y+z=2x+y+3z=10,3x+4y+2z=15,则x+y+z=2x+y+3z=10,3x+4y+2z=15,则x+y+z=2x+y+3z=10