解方程组x+y+z=3 ① 3X+2Y+Z=2 ① 2x+3y+2z=7 ② X+3Y+2Z=1 ② x-y=0 ③ 2
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/07/05 03:20:00
解方程组x+y+z=3 ① 3X+2Y+Z=2 ① 2x+3y+2z=7 ② X+3Y+2Z=1 ② x-y=0 ③ 2X+Y+3Z=9 ③
解方程组x+y+z=3 ① 2x+3y+2z=7 ② x-y=0 ③
3x+2y+z=2 ①
X+3Y+2Z=1 ②
2X+Y+3Z=9 ③
解方程组x+y+z=3 ① 2x+3y+2z=7 ② x-y=0 ③
3x+2y+z=2 ①
X+3Y+2Z=1 ②
2X+Y+3Z=9 ③
![解方程组x+y+z=3 ① 3X+2Y+Z=2 ① 2x+3y+2z=7 ② X+3Y+2Z=1 ② x-y=0 ③ 2](/uploads/image/z/4327170-42-0.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84x%2By%2Bz%3D3+%E2%91%A0+3X%2B2Y%2BZ%3D2+%E2%91%A0+2x%2B3y%2B2z%3D7+%E2%91%A1+X%2B3Y%2B2Z%3D1+%E2%91%A1+x-y%3D0+%E2%91%A2+2)
解方程组x+y+z=3 ① 2x+3y+2z=7 ② x-y=0 ③
将3代入1得2x+z=3 4
将3代入2得5x+2z=7 5
联立4、5得x=1 z=1
所以y=1
解方程组3x+2y+z=2 ① X+3Y+2Z=1 ② 2X+Y+3Z=9 ③
1式×2-2式得5x+y=3 4
1式×3-3式得7x+5y=-3 5
联立4、5得x=1 y=-2
所以z=3
将3代入1得2x+z=3 4
将3代入2得5x+2z=7 5
联立4、5得x=1 z=1
所以y=1
解方程组3x+2y+z=2 ① X+3Y+2Z=1 ② 2X+Y+3Z=9 ③
1式×2-2式得5x+y=3 4
1式×3-3式得7x+5y=-3 5
联立4、5得x=1 y=-2
所以z=3
解方程组x+y+z=3 ① 3X+2Y+Z=2 ① 2x+3y+2z=7 ② X+3Y+2Z=1 ② x-y=0 ③ 2
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
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
解方程组:x-2y+z=-1,x+y+z=2,x+2y+3z=-1
解方程组{2x+3y+z=11,x+y+z=0,3x-y+z=-2.
解方程组:2x+3y+z=3①,7x+6y+z=4②,x+y+z=7/3③.
解方程组:{x+y-2z=-3① {2x+6y+z=2② {x+y+z=0③
解三元一次方程组:(一)2x+y+z=4① x-y+3z=3 ②x+z=2③ 二;①2x+y+z=2 ②x+2y+z=5
1.解下列方程组,①y-2z=1,x+3z=-1,3x-5y+z=21.②x+y+2z=7,x-2y-z=-4,2x+3
已知x,y,z均不为0,且满足方程组{x+y-z=0,①2x-y-5z=0.②试求(2x+y+3z)/(3x-y-z)值
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=——