11x+3y=9 2x+2y+z=8 2x-y+4z=5三元一次方程,
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11x+3y=9 2x+2y+z=8 2x-y+4z=5三元一次方程,
11x+3y=9 2x+2y+z=8 2x-y+4z=5三元一次方程,
11x+3y=9 2x+2y+z=8 2x-y+4z=5三元一次方程,
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z
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
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
3x+2y+z=9,x+y+2z=0,2x+3y-z=11
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
x+y=5 2x+3y-z=9 x-y+z=4
证明 :x/(y+z)+y/(z+x)+z/(x+y)>=3/2其中 x,y,z>0
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
三元一次方程:x+3y+2z=2 3x-y+2z=3 3x+2y-4z=3 2x+y-3z=11 2x-y=7 x+y+z=12还有:7x+2y-z=76x-y+z=74x+3y+z=9 好了,2x+y-3z=11 2x-y=7x+y+z=12
x+2y=3x+2z=4y+z 求x:y:z
x/2=y/3=z/5 x+3y-z/x-3y+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=?
(x*x+2)(y*y+4)(z*z+8)=64xyz,求x,y,z
2x+3y-z=11 2x+y-5z=8 -2+7y+z=19
..1.x+y+z=26,2.4y+3z=7,y-z=1,3x+2z=17,x+2y-z=18 9x-7y=173.x-7y+3z=17 4.2x+4y+3z=95x-6y-z=24 3x-2y+5z=113x+7y-2z=1 5x-6y+7z=131.x+y+z=26,y-z=1x+2y-z=18 2.4y+3z=7,3x+2z=11,9x-7y=17 3.x-7y+3z=17 5x-6y-z=24 3x+7y-2z=14.2x+4y+3z=93x-2y+5z=11 5x-6y+7z=13