Explicație pas cu pas:
a)
(3X - 7) x 4 >= 6 x (5 - 6X)
12X - 28 >= 30 - 36X
48X >= 58
X >= 58/48
X >= 29/24
b)
12X - 12 + 6x + 18 < 12 - 2x
16x < 6
x < 6/16
x < 3/8
c)
xx - 6x - 3x + 18 < xx - 2x -x + 2
-6x < -16
x < 16/6
x < 8/3
