(a+b)/c-b/c=2+b/a(a+b≠0,a,b是常数)

(a+b)/c-b/c=2+b/a(a+b≠0,a,b是常数)
(a+b)/c-b/c=2+b/a(a+b≠0,a,b是常数)

(a+b)/c-b/c=2+b/a(a+b≠0,a,b是常数)
(a+b)/c-b/c=2+b/a
a/c=(2a+b)/a
a²=c(2a+b)
c=a²/(2a+b)

毒奶粉烦恼 电脑

看妈妈m.m.