Réponses

2014-05-20T20:02:57+02:00
Y=1/2x + 1
Y=-2x+6
<=> 1/2x + 1 = -2x +6
1/2x+ 2x = 6-1
1/2x + 4/2x= 5
5/2x = 5
x= 5X 2/5
x= 2