Tolong…jawab dan beri cara penyelesaiannya

1. p/2 = p/7 – 10
p/2 – p/7 = -10
7p/14 - 2p/14 = -10
5p/14 = -10
5p = -10 X 14
5p = -140
p = -140/5
p = -28

2. p/2 – p/3 = (1-p)/6
3p/6 – 2p/6 = (1-p) / 6
p/6 = (1-p) / 6
p/6 X 6 = 1-p
p = 1-p
p+p = 1
2p = 1
p = 1/2

3. 3x + 4 < 2x
3x – 2x < -4
x < -4

4.) 7-3x _> 2x – 3
-3x – 2x _> -3 – 7
-5x _> -10
x _> -10/-5
x _< 2

Semoga membantu.
Maaf kalau ada yang salah.