Question

Urna A contine cu 1/3 mai multe bile decat urna B.Daca urna B contine cu 3 bile mai putin decat urna A,cate bile are urna A?

Answer 1

Răspuns

a=b+b/3

b=a-3=>a=b+3

b+3=b+b/3 se aduce la acelasi numitor comun

3b+9=3b+b=>b=9

a=b+3=>a=9+3=>a=12 bile are urna A