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Se stie ca axb+axc=360. Calculati: 3xax(b+c)

Răspuns :

a x b +a x c =360
a x (b+c) =360
3 x a x ( b + c )= 1080
3a(b+c)=?

ab+ac=360
a(b+c)=360

3*360=1080