Răspuns :
b + 320 = a
a = 3b
b + 320 = 3b => 320 = 2b
b = 320 : 2
b = 160
160 + 320 = 480
Prima scoala are 480 elevi, a doua 160.
a = 3b
b + 320 = 3b => 320 = 2b
b = 320 : 2
b = 160
160 + 320 = 480
Prima scoala are 480 elevi, a doua 160.
b +320=3b=>320=2b b=320 :2=160 160+320=480 1 scoala=480 a doua=160 elevi