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5x < 20
x < 4
b) 12x + 11 > 9x - 1
3x > -12
x > -4
c) 6 - 7x < 3x + 16
-10x < 10
x > -1
5x< 20
x<4
b 12x+11>9x-1
3x> -12
x> -4
c 6 - 7x < 3x + 16
-10x< 10
x> -1
5x -6 <+14 /+6
5x< 20 /:5
x < 4
12x +11> 9x -1
3x >-12
x> -4
6-7x <3x +14
10x< 8
x< 0,8