Question

{5x-2y=15}
{4x+y=12}​

Answer 1

Resposta:

{5x-2y=15   (i)

{4x+y=12  ​ ==>vezes 2 ==>8x+2y=24  (ii)

(i)+(ii)

13x=15+24

13x=39

x=39/3= 3

Usando (i) ==> 5*3-2y=15  ==> y = 0

x= 3  e y=0