Réponses

2013-11-03T13:55:32+01:00
A) x - 1 /2 < 2x + 1 /3
x-2x<1/3+1/2
-x<2/6+3/6
-x<5/6
x>5/6

B) x/2 + 1/3 < 4x/3 - 1/2
x/2-4x/3<-1/2-1/3
3x/6-8x/6<-3/6-2/6
3x-8x<-5
-5x<-5
x<1

C) x + 2/5 + x > x - 3/5 +1
x+x-x>-3/5+1-2/5
x>-3/5+5/5-2/5
x>0