Ajutati-ma va rog :)
daca  axb=2 pe 15 si axc=11pe75,calculati a x(b+c)



Răspuns :

ab+ac=2/15 + 11/75

a(b+c)= 2/15 +11/75   aducem la acelasi numitor

a(b+c)=  (10+11)/75=  21/75=  7/25
a(b+c)=ab+ac= 2/15 + 11/75 = (2*5 +11 ) /75= 21/75= 7/25