у Димы b монет по 2 руб. Сколько рублей у Димы? (b-5, b=7, b=9,)

а)5х2=10                                                                                                                     б)7х2=14                                                                                                                      в)9х2=18

b=5; 5*2=10

b=7; 7*2=14

b=9; 9*2= 18