Răspuns :
a/7=5/3=>a=7*5/3=35/3
a+7/7=(35/3+7)/7=56/3:7=56/21
sau daca am inteles bine
a+7/7=a+1=35/3+1=38/3
a+7/7=(35/3+7)/7=56/3:7=56/21
sau daca am inteles bine
a+7/7=a+1=35/3+1=38/3