Question

Ayuda!!
(X + y = -1
-2x + y = 5 )
Metodo de igualación.

Answer 1

RESOLUCIÓN :

$x+y =-1 x=-1-y........................................(1) ----------------------------- -2x+y=5 y-5=2x y-5/2=x.................................(2) -------------------------------------------------- Igualar 1 y 2 -1-y= y-5/2 2.(-1-y)=y-5 -2-2y=y-5 -2+5=2y-y \\ \\ \boxed{3=y}} --------------------------------------------- Remplazamos para hallar x x=-1-y x=-1-(3) x=-1-3 \\ \\ \boxed{x=-4}}$