Réponses

2014-04-19T16:44:13+02:00
2x+3=5x+1 2x-5x=+1-3 -3x=-2 x= 2/3
3(x+1) = -9 3x+3= -9 3x=-9-3 3x=-12 x= -12 / 3 x= - 4
4-2(x-1) =7x+3 4-2x+2 = 7x+3 -2x-7x=+3-2-4 -9x=-3 x = 3/9
c ça normalement