a:b=7:8,2b:a=( ):( ),2b:3a=( ):( )
问题描述:
a:b=7:8,2b:a=( ):( ),2b:3a=( ):( )
答
a:b=7:8,两边同乘1/2,的a:2b=7:16,的2b:a=16:7,同理的2b:3a=16:21
a:b=7:8,2b:a=( ):( ),2b:3a=( ):( )
a:b=7:8,两边同乘1/2,的a:2b=7:16,的2b:a=16:7,同理的2b:3a=16:21