bjr
8x - 3 ≤ 6x - 10
8x - 6x ≤ -10 + 3
2x ≤ - 7
x ≤ -7/2
solution :
XXXXXXXXXXXXX -7/2 ................
-7/2 compris
2x - 8 ≥ 5x + 7
2x - 5x ≥ 7 + 8
-3x ≥ 15
ATTENTION... -3 devant x... changement de signe !!
x ≤ -15/3
x ≤ -5
XXXXXXXXXXXXXXX -5 ................
