Jawabanmu

2014-05-08T18:14:18+07:00
A) 1/2 x + 5 > 15
1/2 x > 15-5
1/2 x > 10
x > 2 × 10
x > 20

b) 2 - (4 + x) ≥ -22
- (4 + x) ≥ -22 -2
- 4 - x ≥ -24
- 4 + 24 ≥ x
20 ≥ x
x ≤ 20

c) 2/3 p + 4 ≤ 8
2/3 p ≤ 8-4
2/3 p ≤ 4
p ≤ 3/2 × 4
p ≤ 6

d) 2x -4 > 3x +9
-4 - 9 > 3x - 2x
-13 > x
x<-13

e) (2y - 7)/2 ≤ 3
(2y - 7) ≤ 3× 2
2y - 7 ≤ 6
2y ≤ 13
y ≤ 6 1/2