Ответы и объяснения

2014-04-09T17:31:10+04:00
Х+356=2400/6            с*(107-89)=414     д/15+706=1002
х+356=400                 107с-89с=414      д/15=1002-706
х=400-356                    18с=414            д/15=296
х=44                            с=414/18           д=296*15 
                                    с=23                 д=4440