2. 2/3p ≤ 8-4
2/3p ≤ 4
p ≤ 4-2/3
p ≤ 12/3 -2/3
p ≤ 10/3

3. 2 -4 -x ≥ -22
-2 -x ≥ -22
-x ≥ -22 + 2
-x ≥ 20
x ≤ 20
1. 1/2x+5 >15y
1/2x - 15y < -5
Trims ya

Jawabanmu

2014-01-27T16:38:16+07:00
1. 1/2x + 5 > 15y
    x + 5 > 30 y
   x/y > 30 - 5
   x/y > 25
  x > 25y

2. 2/3p + 4 ≤ 8
   2/3p ≤ 8 - 4
   2/3p ≤ 4
   p ≤ 4 x 3/2
   p ≤ 6

2. 2 - (4 +x) ≥ - 22
   2 (-4-x) ≥ -22
   -8 - 2x ≥ - 22
   -8 + 22 ≥ 2x
   14 ≥ 2x
   x ≥ 7