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349:(7+A)=7,6 PLS VAROG PRIMUL RASPUNS CORECT VA PRIMI COROANA JUR

Răspuns :

7+a=349 : 76/10
7+a=(349×10)/76
7+a=3490/76=1745/38
a=1745/38 - 7
a=(1745-7×38)/38
a=(1745-266)/38
a=1479/38