Question

alguém sabe resolver esse sistema x+2*y=5 e 2*x-y=24

Answer 1

x+2y=5   (multiplica -2)
2x-y=24 
>
-2x-4y=-20
2x-4y=24
_________(somando)_
0 -8y=4
-y=4/8
y= -2/4
y= - 1/2