👤

a×b+a×c=42
b+c=7
Rog urgent!!!


Răspuns :

ab+ac=42
a(b+c)=42
7a=42
a=42:7
a=6
ab+ac= 42
dam factor comun pe a
a(b+c)= 42
7a=42
a= 42/7
a=6

O zi buna!