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a)suma a trei nr consecutive este 24.Sa se afle numerele;b)suma a trei nr consecutive este 27.Sa se afle numerele;c)Suma a trei nr consecutive este 33.Sa se afle numerele;d)Suma a trei nr consecutive este 36.Sa se afle numerele;e)Suma a trei nr consecutive impare este 33.Sa se afle numerele;f)Suma a cinci nr consecutive pare este 50.Sa se afle nr....

Răspuns :

A) 24 -3=21       21:3-7 primul numar                                                                                    7+1=8 al doilea numar            8+1=9 al  treilea numar                                                                          B)   27-3=24
primul numar este 24:3=8
al doilea numar este 8+1=9
al treilea numar este 9+1=10                                                        C)     a+b+c=33
a+a+1+a+2 =33
3a+3 =33
3a=33-3=30
a=30:3=10 
a=10
b=a+1=10+1=11
c=a+2=10+2=12                                                                                      D)  a+a+2+a+4=36
3a=36-4-2
3a=30
a=30/3
a=10
a+2=10+2=12
a+4=10+4=14                                                                                         E) (a+1)+(b+3)+(c+5)=33

/........../+1
/........../+3
/........../+5  33-9=24 deci 24:3=8

a=8+1=9
b=8+3=11
c=8+5=13

9+11+13=33
F)   a+a+2+a+4+a+6+a+8=50                                                                      5a+20=50                                                                                              5a= 30                  30                                                                                                            -                                                                                                              5        a=6                                                                                                           6+8+10+12+14=50  Coroana?

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