方程组{x+y+z=50,1500x+2100y+2500z方程组是{x+y+z=50,1500x+2100y+2500z=90000

来源:学生作业帮助网 编辑:六六作业网 时间:2024/10/18 13:10:26
方程组{x+y+z=50,1500x+2100y+2500z方程组是{x+y+z=50,1500x+2100y+2500z=90000方程组{x+y+z=50,1500x+2100y+2500z方程组

方程组{x+y+z=50,1500x+2100y+2500z方程组是{x+y+z=50,1500x+2100y+2500z=90000
方程组{x+y+z=50,1500x+2100y+2500z
方程组是{x+y+z=50,1500x+2100y+2500z=90000

方程组{x+y+z=50,1500x+2100y+2500z方程组是{x+y+z=50,1500x+2100y+2500z=90000
X=50-y-z再把x=50-y-z代入1500x+2100y+2500z