Question

{x+y=5
{2x-y=9
me ajudem??

Answer 1

{x+y=5
{2x-y=9
-------------( + )
3x= 14
x= 14/3



X + Y = 5
14/3 + Y = 5
Y = 5 - 14/3
Y = 1/3


s ( 14/3 e 1/3 )