Réponse:
j)
7-4(2x-1)<= 2 - 2(3x+1)
7- 8x +4 <= 2 - 6x - 2
-8x + 6x <= 0 - 11
-2x <= -11
x>= 11/2
x>= 5.5
k)
2(-2x+5)>7(-2x+3)
-4x + 10 > -14x + 21
10x > 21 -10
10x > 11
x> 1.1
l)
( 7-2x) /3 > 1
7-2x > 1*3
-2x> 3-7
x< 4/2
x< 2
