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Suma a doua numere este 225, iar diferenta lor este 15.
Sa se afle cele doua numere.

Răspuns :

IsabellaMarya
a+b=225

a-b=15=> a=15+b

Inlocuim in prima ecuatie:

15+b+b=225

2b=225-15

2b= 210

b=210:2

b= 105

a=15+105

a=120


a+b=225                                                                         a-b=15

a=b+15                                                                           b+15+b=225

2b+15=225                                                                     2b=225-15

2b=210                                                                           b=210:2

b=105                                                                             a=105+15

a+120

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