x+y+2z=5 ①
2x-y-z=4 ②
3x+y-3z=10 ③
①+②;3x+z=9 ④
②+③ 5x-4z=14 ⑤
4×④+⑤; x=50/17 ⑥
⑥代入④；z=3/17 ⑦
⑥,⑦代入②;y=29/17
x+y+2z=5 2x-y-z=4 3x+y-3z=10
2个回答
相关问题
-
x+y+z=2 ① 2x+3y+z=38 ① x+y=3 3x-y-4z=5 ② 3x+4y+2z+56 ② y+z=5
-
{x+2y+4z=0{2x-y+3z=-10{3x+y+2z=5
-
x-5y-3z=0 y+z-3x=3 x+y+3z=14 y+4z=3 z+x-3y=5 2x+y+z=7 2x-z=1
-
3x+2y+z=4 x+y+z=10 2x+3y-z=1
-
9x+4y+z=10 {-9x+2y+3z=-6 3x-4y+2z=5
-
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
-
x+2z=3 x+y+z=2 2x+y=2 3x-y-4z=5 2y+z=7 2x+3y-2z=0
-
x-2y+z=9, 2x+y+3z=10, 3x+2y-4z=-3
-
x-3y+2z=1 2x+2y-3z=-10 4x-8y+5z=6
-
x-y-5z=4,2x+y-3z=10,3x+y+z=8解方程组