Question

patru pixuri de acelasi fel costa 20 de lei.8 astfel de pixuri costa....lei

Answer 1

$4p...........20lei \\ 8p...........x \\\\\\ x=\frac{\not8*20}{\not4} \\\\ x=2*20 \\\\ \boxed{x=40 \ lei}$

Answer 2

4/8=20/y
⇒y=8·20/4
⇒y=8·5
⇒y=40[lei];