{x+y=5,y+z=4,z+x=3
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/27 01:11:31
{x+y=5,y+z=4,z+x=3{x+y=5,y+z=4,z+x=3{x+y=5,y+z=4,z+x=31式+2式+3式=2x+2y+2z=12x+y+z=6再减去1式得z=1x=2y=3x+y=
{x+y=5,y+z=4,z+x=3
{x+y=5,y+z=4,z+x=3
{x+y=5,y+z=4,z+x=3
1式+2式+3式=2x+2y+2z=12
x+y+z=6再减去1式得
z=1x=2 y=3
x+y=5,y+z=4,z+x=3
x+y+z = 5+4+3 /2 = 6
z= 1 x = 2 y = 3
你好
{x+y=5, (1)
y+z=4, (2)
z+x=3 (3)
(1)+(2)+(3)
2(x+y+z)=12
x+y+z=6 (4)
(4)-(1)
z=1
(4)-(2)
x=2
(4)-(3)
y=3
方程组的解为
{x=2...
全部展开
你好
{x+y=5, (1)
y+z=4, (2)
z+x=3 (3)
(1)+(2)+(3)
2(x+y+z)=12
x+y+z=6 (4)
(4)-(1)
z=1
(4)-(2)
x=2
(4)-(3)
y=3
方程组的解为
{x=2
y=3
z=1
数学辅导团为您解答,不理解请追问,理解请及时选为满意回答!(*^__^*)谢谢!
收起
(x+y):(y+z):(z+x)=3:4:5 3x+y-z=-4已知(x+y):(y+z):(z+x)=3:4:5 ;3x+y-z=-4求x y z
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z
(x+y-z)(x-y+z)=
x+y/2=z+x/3=y+z/4 x+y+z=27
x/2=y/3=z/5 x+3y-z/x-3y+z
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
x+2y=3x+2z=4y+z 求x:y:z
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
x+y=5 2x+3y-z=9 x-y+z=4
已知3X=4X,5Y=6Z求X+Y:Y+Z
x,y,z不是0.3z=4y,z=3x求(x+y):(x+z).
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
一只x/3=y/4=z/5,求x+y+z/x及x+y+z/x-y+z的值
已知:4x-5y+2z=0 x+4y-3z=0则:(x*x+y*y+z*z)/(x*y+y*z+z*x)=____.
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
3x-2y+z=4 x+y-z=5 4x-4y+3z=27