2x+2y+2z=12-----①
2x+2y+4z=14-----②
4x+3y+z=10-------③
②-①
2z=2
z=1
分别将z=1带入②③
2x+2y=10---------④
4x+3y=9-----------⑤
④*2-⑤
y=11
x=-6
2x+2Y+2z=12 2x+2y+4z=14 x+3y+z=10
1个回答
相关问题
-
一.｛x+2y+3z=14 2x-y-z=-3 3x+y+z=8 二.｛3X-2Y-2Z=3 2X+2Y+3Z=12 X
-
3x+2y+z=14 { x+y+z=10 2x+3y-z=1
-
3x+2y+z=14 ,x+y+z=10,z+2x+3y=1 5
-
x-y+2z=6 y-z+2x=14 z-x+2y=4
-
3x-y+z=14 2x+3y-z=12 x+y+z=16
-
-x+2y+3z=12 2x-2y+5z=13 3x+2y+z=10
-
3x+2y=14,x+y+z=10,2x+3y-z=1
-
x：y：z=2:3:4,x+2y-z=12,求x,y,z
-
x+2y+3z=14 2x+y+z=7 3x+y+2z=11 求x y z
-
1,{2x+y+z=-26,x+2y+z=-30,x+y+2z=-28 2,{5x+2y+z=12,4x+3y+z=13