Bonsoir,
a) (5/2)x+4>x+6
(5/2)x-(2/2)x+4>x-(2/2)x+6
(3/2)x+4>6
1,5x+4-4>6-4
1,5x>2
1,5x:1,5>2:1,5
x>4/3
b) (14/3)x⩽2x-1/3
(8/3)x⩽-1/3
x⩽-0,125
c) (7/9)x+4⩾(1/3)x-3
(5/9)x+4⩾-3
(5/9)x⩾-7
x⩾-12,6
d) (-1/2)x-1<(1/5)x+1/4
(-5/10)x-1<(2/10)x+1/4
-1<(7/10)x+1/4
-1,25<(7/10)x
-25/14<x
