(2x+100)/7=x => x=20
Quote from: valur111 on 04 ThuUTC2014-12-04T23:30:51+00:00UTC12bUTCThu, 04 Dec 2014 23:30:51 +0000 2014, 23:30:51 (2x+100)/7=x => x=20Начало:1х2х3=1+2+3 (с) Пифагор ))
[youtube]http://www.youtube.com/watch?v=o43nqvq4BOA[/youtube]