x+y=1/6 y+z=1/10 x+z=2/15解这个三元一次方程
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已知 x/(y+z)+y/(z+x)+z/(x+y)=1求 (x*x)/(y+z)+(y*y)/(x+z)+(z*z)/(x+y)=?
x+y+z=6 x+2y+3z=14 y+1=z
(x+y+z)÷10=x+1.1 y+x=z-80+y-1 z-y=8x+y+8 x+z÷y=?
解方程组:{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10
100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 解方程组100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 .急.
{x+y-z=11 y+z-x=5 z+x-y=1
{x+y-z=11,x-y-z=-5,x-y+z=1
解三元一次方程组:(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y+2z=40(3)x+y-z=2y+z-x=4z+x-y=6谢谢!
(x+y-z)(x-y+z)=
(1)X+Y=15,Y+Z=-6,Z+X=7.(2)X+Y=-14,Y+Z=-7,Z+X=9.(3)X+Y=0,Y+Z=-1,Z+X=-1.
X/Y+Z=Y/X+Z+1=Z/X+Y-1=X+Y+Z,求x+y+z等于多少
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
{3x-2y+z=-1 2x+y-3z=10 x-y-2z=1
[3x+2y+z=14,x+y+z=10,2x+3y-z=1]
3x+2y+z=4 x+y+z=10 2x+3y-z=1
3x+2y+z=14 { x+y+z=10 2x+3y-z=1
4x+y+z=-3 2x+3y-4z=-10 x+2y-z=-1