{4/7x+[(4/7x-12)*12]} :(1-4/7x) = 27:8
问题描述：
{4/7x+[(4/7x-12)*12]} :(1-4/7x) = 27:8
答
{4/7x+[(4/7x-12)*12]} : (1-4/7x)
={4x+[(4x-84)*12]}:(7-4x)
=(52x-84*12):(7-4x)= 27:8
化简
524x=8253
x=63/4