Aufgabe 2 b)

 

 

 (15x + 3)                        =    -  (4 – 4x)          Anwendung der Strategie 2

 

20x + 4                              =    -2 + 2x                  | – 4

 

20x                                     =    -6 + 2x                  | – 2x

 

18x                                     =    -6                           | : 18

 

                            x             =    -  = -