Jawabanmu

2014-08-26T19:26:40+07:00
X - 2b - 4 kalau nggak salah
Jawaban paling cerdas!
2014-08-26T19:30:28+07:00
X-(2b+4b)-5b+b-4
X-(6b-5b)+b-4
X-b+b-4
X-2b-4
1 5 1