x+2y+3z=1 2x+3y+z=2 3x+y+2z=3
x+2y+3z=1(1)2x+3y+z=2(2)3x+y+2z=3(3)解:(1)+(2)+(3),得 6x+6y+6z=6 x+y+z=1(4)(2)-(1),得 x+y-2z=1(5)(4)-(5)得 3z=0 z=0(6)(6)代入(4)得 x+y=1(7)(7)代入(1),得 1+y=1 y=0(8)(8)代入(7)得 x...
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...
三元一次方程 (1)X+2y+3z=1 (2)2x+3y+z=2 (3)3X+y+2z=3
联立④⑤,得{y+2z=0;5y+7z=0 解得{y=0;z=0 把{y=0;z=0代人①,得x+2*0+3*0=1 解得x=1 ∴方程组的解为{x=1;y=0;z=0
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求这个三元一次方程组的解!!谢谢各位哥 ...
x+2y+3z=2 (1)3x+y+2z=3 (2)2x+3y+z=4 (3)(2)×2-(1)5x+z=4 z=4-5x (2)×3-(1)×2 7x-y=5 y=7x-5 y=7x-5 z=4-5x代入(3)2x+3(7x-5)+(4-5x)=4,整理,得 18x=15 x=5\/6 y=7x-5=35\/6 -5=5\/6 z=4-5x=4-25\/6=-1\/6 x=5\/...
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
已知x+2y+3z=2 3x+y+2z=3 2x+3y+z=4求X+Y+Z的值?
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)+(3)得6x+...
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
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
...方程组{x+2y+3z=2,3x+y+2z=3.2x+3y+z=14 求x+y+z的值?
3x+y+2z=3 2x+3y+z=14 可以看出,等号左边的三个代数式相加的和值应该等于等号右边的三个数相加的和值,所以:(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...