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Cine poste da imi rezolve si mie aces exercitiu ? Stiind ca a •(b+c)=3114si a•b=1107 , calculati a•c


Răspuns :

a(b+c)=3114
a×b=1107

a(b+c)=3114
a×b+a×c=3114
1107+a×c=3114
a×c=3114-1107
a×c=2007