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3x+15x-30x<8-6+7
-12x<9/-12
x<-9/12
b)14-8-6x<15+9-3x
-6x+3x>15+9+8-14
-3x<18/:-3
x<-6
c)x+5-17+3x>6+14x-21
x+3x-14x>6-21+17-5
-10x>-3/:-10
x<0,3
d)2x - 5/3 + 3 - 2x/4 < 1 /* 12
24 - 20 + 36 - 6x < 12
-6x < 12 - 36 + 20 - 24
-6x < - 28 /: (-6)
x > 4 i 2/3
e) x - 3/2 - 2x + 1/3 < 1 /*6
6x - 9 - 12x + 2 < 6
-6x < 13 /: (-6)
x > (-2 i 1/6)