Care dintre afirmatiile urmatoare sunt adevarate si care sunt false ?                                                                                                                                             a=5,atunci ax7=35  axb=36,atunci a=0  axb=c,atunci axc=b  a:b=c,atunci a=bxc  a=b,atunci                                                                                                                                                 1_   din a reprezinta cat  1_  din b                          4                                   3                                                                                                                                                                                                                 4