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2<2-x/2
2-2<-x/2
0<-x/2
0<-x
0>x
dan
2-x/2<3
-x/2<3-2
-x/2<1
-x<2
x>2
⇒ 3 - 2x < 4
-2x < 4 - 3
-2x < 1
x < -1/2
⇒ 3 - 2x < -4
-2x < -4 -3
-2x < -7
x < 7/2
jadi, 7/2 < x < -1/2
b ) l x/2 + 5 l > 9
9 < x/2 + 5 < -9
9 - 5 < x/2 < -9 - 5
4 < x/2 < -14
8 < x < -28
c ) l 3x + 2 l < 5
-5 < 3x + 2 < 5
-5 -2 < 3x < 5 - 2
-7 < 3x < 3
-7/3 < x < 1