(20:a+20):6=50:10.        Cum se rezolva?




Răspuns :

10/3a+10/3=5
10+10a=15a
5a=10
a=2
(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