Question

daca a:x=15 si b:x=5 calculati (a+b):x

Answer 1

45:3=15 
15:3=5
45+15=60
60:3=20
eu asa mam gindit

Answer 2

a:x=15 => a=15x
b:x=5 => b=5x
(a+b):x
(15x+5x):x=20x :x=20