Question

in 2 cosuri cos avem 20 de fructe, banane si portocale.Daca am adauga 4 portocale in un cos am avea de trei ori mai multe decat banene.Cate portocale si cate banane avem?

Answer 1

p +b = 20
p +4 = 3×b => p = 3×b-4
p |___|___|___|-4
b |___|
avem 4 segmente egale-4 = 20
20 +4 = 24
24 : 4 = 6 ( un segment)
p = 3×6-4 = 18-4 = 14
b = 6

Verificare:
14+6 = 20
14+4 = 3×6
18 = 18

14 portocale
6 banane