Question

Determinati nr naturl x pentru care fractia 2x+1/28-x este fractie echiunitara

Answer 1

2x+1/28-x - fractie echiunitara  daca 2x+1=28-x        
                                                          2x=28-x-1
                                                            2x=27-x
                                                           2x+x=27
                                                             3x=27
                                                   atunci x=27/3 =9

Answer 2

2x+1/28-x=
2x+1=28-1
3x=27
x=27/3
x=9
 pe 9 il putem scrie 3/3 si este o fractie echiunitara
x=3/3