x+y-z=6(1) x-3y+2z=1(2) 3x+2y-z=4(3) 过程
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x+y-z=6(1)x-3y+2z=1(2)3x+2y-z=4(3)过程x+y-z=6(1)x-3y+2z=1(2)3x+2y-z=4(3)过程x+y-z=6(1)x-3y+2z=1(2)3x+2y-
x+y-z=6(1) x-3y+2z=1(2) 3x+2y-z=4(3) 过程
x+y-z=6(1) x-3y+2z=1(2) 3x+2y-z=4(3) 过程
x+y-z=6(1) x-3y+2z=1(2) 3x+2y-z=4(3) 过程
(1)x2=2x+2y-2z=12
(1)+(2)=3x-y=13 3x=y+13
(3):3y+13-z=4 3y-z=-9
{x+3y=-17 3x-y=13
x=2.2 y=-6.4 z=-10.2
x+2y+3z=2
3x+y+2z=3
2x+3y+z=4
三个式子相加,得:
6X+6Y+6Z=9
X+Y+Z=1.5
x+y+z=6 x+2y+3z=14 y+1=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
(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.
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)=?
若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值
x=2y-9z x+2y-3z=2 x-2y+6z=1
x+y-z=6 x-3y+2z=1 3x+2y-z=4 阿
x+y-z=6,x-3y+2z=1,3x+2y-z=4
x+y-z=6 x-3y+2z=1 3x+2y-z=4
x+y-z=6 x-3y+2z=1 3x+y-z=4
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
x+y+z=1 4x+5y-z=6 x+2y-z=3
1.{x:y:z=3:4:5 2x+3y-5z=-142.{x-y-z=-1 3x+5y+7z=11 4x-y+2z=-13.{x+y=1 x+z=0 2x+y+2z=44.{x-y+z=-3 2x-y-z=-2 -3x+y+z=-15.{x-y+z=-3 3x+y-4z=6 2x+y-z=36.{x-2y+5z=16 2x+y-5z=7 2x-y+z=38
x+y-z=6(1) x-3y+2z=1(2) 3x+2y-z=4(3) 求X Y Z 的值
解三元一次方程组 ①2x-y+z=1 3x+y -2z=2 X+2y-z=3 ②x-4y+z=-3 2x+Y-Z=18 X-Y-Z=7 ③4x+4y+2z=7 6X-4y-z=6 2x-y+z=1
已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z.
{x-y+z=6,x+3y=-1,y+2z=3