Respostas

  • Usuário do Brainly
2014-05-10T13:47:38-03:00
{6x + y = 2
{5x + 2y = 2

6x + y = 2
y = 2 - 6x

5x + 2y = 2
5x + 2 . (2 - 6x) = 2
5x + 4 - 12x = 2
5x - 12x = 2 - 4
- 7x = - 2 . (- 1)
7x = 2
x = 2/7

y = 2 - 6x
y = 2 - 6 . (2/7)
y = 2 - 12/7
y = 2/1 - 12/7
y = (14 - 12)/7
y = 2/7