Réponses

2012-05-17T17:17:08+02:00

Tu as y = 12-4x

Donc -3x+6y = -3x+6(12-4x) = 7

-3x+72-24x = 7

-27x = -65

x = 65/27

y = 12-4(65/27)

y = 324/27 - 260/27

y = 64/27

 

FIN