Afla numerele necunoscute:

a+560=780                     c-2315=1324                 4500+e=6800            6500-g=2300

b+2340=5687                d-345=1300                   325+f=330                  8794-h=4326

Rezolvare:

a+560=780                 b+2430=5687                    c-2315=1324                d-345=1300                  4500+e=6800

a=780-560                  b=5687-2430                     c=1324+2315               d=1300+345                 e=6800-4500

a=220                          b=3257                                 c=3639                           d=1645                          e=2300

325+f=330                      6500-g=2300                8794-h=4326

f=330-325                       g=6500-2300                h=8794-4326

f=5                                    g=4200                           h=4468