Răspuns:
Explicație pas cu pas:
7x - 2,4 < 0,4
7x < 2,8
x < 0,4
S = (-∞, 0,4)
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17 - x > 10 - 6x
6x - x > 10 - 17
5x > - 7
x > -7/5
S = (-7/5, +∞)
________________
1 - 5x > 3
5x < 1 - 3
5x < - 2
x < -2/5
S = (-∞, -2/5)
__________________
30 + 5x < 18 - 7x
5x + 7x <18 - 30
12x < -12
x < -1
S = (-∞, -1)
____________________
2x - 17 > - 27
2x > 17 - 27
2x > - 10
x > - 5
S = (-5, +∞)
_______________________
64 - 6x > 1 - x
64 - 1 > 6x - x
63 > 5x
x < 63/5
S = (-∞, 63/5)
___________________
2 = 3x ≤ 1
2 = 3x rezulta x = 2/3
2/3 este ≤ 1
S = {2/3}
Totusi cred ca era 2 - 3x ≤ 1
____________________
8 + 5x < 21 + 6x
8 - 21 < 6x - 5x
x > -13
S = (-13, +∞)
__________________
2x - 16 > 5x + 32
5x - 2x < -16 - 32
3x < -48
x < -16
S = (-∞, -16)
