方程组{x+y+z=50,1500x+2100y+2500z
问题描述:
方程组{x+y+z=50,1500x+2100y+2500z
方程组是{x+y+z=50,1500x+2100y+2500z=90000
答
X=50-y-z再把x=50-y-z代入1500x+2100y+2500z
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