Question

2x-y=20 e 2x y = 48 pelo metodo da adiçao

Answer 1

{2x-y=20
{2x+y=48
4x=68
x=68/4
x=17
2x+y=48
2.17+y=48
34+y=48
y=48-34
y=14
S={(17, 14)}