Răspunsuri

  • Utilizator Brainly
2014-01-24T18:03:39+02:00
Cel mai inteligent răspuns!
2014-01-24T18:04:39+02:00
(20:a+20):6=5

(20 : 2 + 20 ):6 =5
(10 + 20) : 6=5
30 : 6 = 5 

adica 
 20:a+20=30
20:a = 30 -20
20: a = 10
a = 20 : 10 
a = 2

1 5 1