2a-b+3c=0,3a+b-c=0求a:b:
问题描述:
2a-b+3c=0,3a+b-c=0求a:b:
答
-2:11:5
b=2a+3c,b=c-3a
2a+3c=c-3a
a=-2/5c
b=11/5c
a:b:c=-2:11:5