Răspuns :
2a:4 = 2a/4
2a/4+2a+15 = 4a
2a+8a+60 = 16a
10a+60 = 16a
10a-16a = -60
-6a = -60
6a = 60
a = 60/6
a = 10.
Succes!
2a/4+2a+15 = 4a
2a+8a+60 = 16a
10a+60 = 16a
10a-16a = -60
-6a = -60
6a = 60
a = 60/6
a = 10.
Succes!