式子5x+2与2-4x分之3互为相反数；求x的知
问题描述：
式子5x+2与2-4x分之3互为相反数；求x的知
答
5x+2=-3/(2-4x)
(5x+2)(2-4x)=-3
20x^2-2x-7=0
x=(1±2√5)/20
答
5x+2=3/(2-4x)
(5x+2)(2-4x)=3
-20x^2+2x+4=3
20x^2-2x-1=0
x=(1±√21)/20
答
5x+2+3/2-4x=o
(5x+2)*(2-4x)+3=0
提示就到这裏你自己算
答
5x+2=-3/(2-4x)
x=(1±√141）/20