Resposta :
- x + 2y = 0 ==> x = 2y
3x + 5y = 0
3(2y) + 5y = 0
6y + 5y = 0
11y = 0
y = 0
x = 2y ==> x =2.(0) ==> x = 0
3x + 5y = 0
3(2y) + 5y = 0
6y + 5y = 0
11y = 0
y = 0
x = 2y ==> x =2.(0) ==> x = 0