Question

Arata ca daca 5I(x+2y) atunci 5I(4x+3y)

Answer 1

$5~|~5(x+y) \Leftrightarrow~5~|~5x+5y. \\ \\ 5~|~x+2y~si~5~|~5x+5y \Rightarrow 5~|~(5x+5y)-(x+2y) \Leftrightarrow \boxed{5~|~4x+3y}$

Answer 2

5/5[x+y]⇒5/5⇒adevarat;
5/[x+2y]⇒5/5[x+2y];
⇒5/5x+5y⇒5/4x+3y⇒adevarat;