解方程组:x+2y+3z=80,x/2+y/3=z/4,
问题描述:
解方程组:x+2y+3z=80,x/2+y/3=z/4,
答
x+2y+3z=80.1
,x/2+y/3=z/4.2
由2式得:6x+4y=3z代入1式得:
7x+6y=80解有无数组,如:
x=2,y=11,z=56/3
x=4,y=26/3,z=176/9
x=8,y=4,z=64/3