{x+2y+3z=-2,3x+y+2z=-1,2x+3y+z=-3
x+2y+3z=-2 ① 3x+y+2z=-1 ② 2x+3y+z=-3 ③ 解:3① - ②,得到:5y + 7z = - 5 ④ 2① - ③,得到:y + 5z = -1 ⑤ 由④、⑤组成方程组,解方程,可以得到:y = - 1 z = 0 将y 、 z 的值代入随意的一个式子中,可以得到:x = 0 综上所述,该...
三元一次方程组{x+2y+3z=2,3x+y+2z=3.2x+3y+z=14 求x+y+z的值?
(x+2y+3z)+(3x+y+2z)+(2x+3y+z)=2+3+14 合并同类项,得:6x+6y+6z=19,所以,可得到:6(x+y+z)=19 所以:x+y+z=19\/6 最后的答案是六分之十九,只要你提供的数字和等式没有写错,方法和答案是不会错的.,1,
已知x+2y+3z=2 3x+y+2z=3 2x+3y+z=4求X+Y+Z的值?
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=1.5,8,x+2y+3z=2 3x+y+2z=3 2x+3y+z=4 三式相加得6x+6y+6z=9 所以x+y+z=9\/6=3\/2,2,x+2y+3z=2 3x+y+2z=3 2x+3y+z=4 三式相加得6x+6y+6z=9 所以x+y+z=9\/6=3\/2,0,(1)+(2)...
已知x+2y+3z=2,3x+y+2z=3,2z+3y+z=4,求x+y+z的值
x+2y+3z=2,(1)3x+y+2z=3, (2)2x+3y+z=4 (3)(1)+(2)+(3)得 6(x+y+z)=9 得x+y+z=3\/2
已知:x+2y+3z=2,3x+y+2z=3,2x+3y+z=4,求x+y+z的ŀ
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 运用了整体思想,老师教了,肯定对望对你有帮助,O(∩_∩)O谢谢
x+2y+3z=12x+3y+z=23x+y+2z=3
x+2y+3z=1 ①2x+3y+z=2 ②3x+y+2z=3 ③①×2-②,可得:y+5z=0,④;②×3-③×2,可得:7y-z=0,⑤;由⑤可得z=7y,把z=7y代入④,可得:y+5×7y=0,则y=0,把y=0,代入z=7y,可得z=0;把y=0,z=0代入①可得:x+0+0=1,则x=1,所以这个方程组的解...
x+2y+3z=2,3x+y+2z=3,2x+3y+z=4,求x+y+z的值 过程详细点啊急急急急...
x+2y+3z=2 3x+y+2z=3 2x+3y+z=4 3式相加 6x+6y+6z=9 x+y+z=2\/3
x+2y+3z=1 2x+3y+z=2 3x+y+2z=3
末日之剑vc ,x+2y+3z=1(1)2x+3y+z=2(2)3x+y+2z=3(3)(1)+(2)+(3),得6x+6y+6z=6x+y+z=1(4)(2)-(1),得x+y-2z=1(5)(4)-(5)得3z=0z=0(6)(6)代入(4)得x+y=1(7)(7)代入(1),得1+y=1y=0(8)(8)代入(7)得x=1所以...
x+2y+3z=3 3x+y+2z=7 2x+3y+z=2 求XYZ分别为多少
X+2Y+3Z=3 (1)3X+Y+2Z=7 (2)2X+3Y+Z=2 (3)(1)+(3)-(2)得:4Y+2Z=-2即:2Y+Z=-1 (4)(1)*2-(3)得:Y+5Z=4即 Y=4-5Z (5)(5)代入(4)得:Z=1代入(5)得:Y=-1 将Z=1,Y=-1代入(1)得:X=2 所以:X=2 Y=-1 Z=1 ...
2x-y+3z=3 3x+y-2z=-1 x+y+z=5解方程组
2x-y+3z=3……(1)3x+y-2z=-1……(2)x+y+z=5……(3)消去x,关于y、z的方程组:由(3)×2-(1)得: 3y-z=7 由(3)×3-(2)得: 2y+5z=16 解得:y=3,z=2 代入可得:x=0 x=0 y=3 z=2