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a+b=857
a-b=343
Prin metoda grafica va rog


Răspuns :

a I---------I------------I

                                              857

b I---------I       343 I

Cat reprezinta 2 parti egale?

2b=857-343=514

Cat reprezinta b?

b=514:2=257

Cat reprezinta a?

a=b+343=257+343=600

Verificare:257+600=857