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Afla valoarea lui a din relatia:
9+8-4-5+3+2-9+5+a= 11​


Răspuns :

9+8-4-5+3+2-9+5+a= 11

9+8-9+5-9+5+a=11

8+10-9+a=11

8+1+a=11

a=11-9=2

a=2

9+8-4-5+3+2-9+5+a=11

9+4-5+3+2-9+5+a=11

13-5+3+2-9+5+a=11

8+3+2-9+5+a=11

13-9+5+a=11

4+5+a=11

9+a=11

a=11-9

a=2

Sper ca team ajutat :)