Question

va rog,ma ajuta cineva ?! mersy...

Answer 1

a=2b =>inlocuim in  $\frac{2a-b}{3b}$ =>
$\frac{2*2b-b}{3b}$ =$\frac{3b}{3b}$ =1

Coronita? :)

Answer 2

b/a=1/2  ⇒ a=2b
(2a-b)/3b=?

(2*2b-b)/3b=(4b-b)/3b=3b/3b=1