Jawabanmu

Jawaban paling cerdas!
2014-08-28T02:07:42+07:00
-4 < 4x
-1 < x

4x < 3
x < 3/4

jadi,,,
= -1 < x <  \frac{3}{4}
1 5 1
2014-08-28T03:28:05+07:00
1<4x+5<8                4x+5<8
⇔4x+5>1                ⇔4x<3
⇔4x>-4

jadi, -4<4x<3
       -1<x< \frac{3}{4}