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a) Daca ab+ac+ad=2014 si b+c+d=1007, aflati a
b) Daca mn+mp-mq=2015 si m=5, aflati n+p-q


Răspuns :

Ab+ac+ad= a(b+c+d)=2014 B+c+d=1007 => a =2 Mn+mp+mq=m(n+p+q)=2015 M=5 => n+p+q=403