解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2),2x+4y+3z=9,3x-2y+5z=11,5x-6y+3z=1.

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/20 12:58:02
解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28;(2解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28;(2),2x+4y+3z=9

解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2),2x+4y+3z=9,3x-2y+5z=11,5x-6y+3z=1.
解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2
解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28;     (2),2x+4y+3z=9,3x-2y+5z=11,5x-6y+3z=1.

解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2解下列方程组:(1),x+y/3+x-y/2=6,3(x+y)-2(x-y)=28; (2),2x+4y+3z=9,3x-2y+5z=11,5x-6y+3z=1.
①+②×2,得8x+13z=31 ④ ②×3-③,得4x+8z=20 ⑤ ④-⑤×2,得-3z=-9,解得 z=3 代入⑤,解得x=-1 代入①,解得y=0.5