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stiind ca a+7+b = 37 calculati
(a+b)+5

a+(b+11)

47-(a+b)


Răspuns :

Daca a+7+b=37 atunci a+b=37-7=30. (a+b)+5=30+5=35; a+(b+11)=30+11=41; 47-(a+b)=47-30=17.