Jawabanmu

2014-07-23T00:31:24+07:00
2014-07-23T02:18:37+07:00
 \frac{1}{2}  \frac{4x + 5}{2} ≤ 4

 \frac{4x + 5}{2}  \frac{1}{2}
   4x + 5 ≥ 1
   4x ≥ -4
     x ≥ -1

 \frac{4x + 5}{2} ≤ 4
   4x + 5 ≤ 8
   4x ≤ 3
     x ≤  \frac{3}{4}

jadi,
-1 ≤ x ≤  \frac{3}{4}