tolong kerjakan nomor 3.b dan c. nomor 4.b dan d

3.
(B) 1/2P = 2 - 1/2P
1/2P + 1/2P =2
P=2

(C) 1/2 - K/5 = 1/10
(5 - 1) / 10 = K/5
4/10 = K/5
K = 20/10
K = 2

4.
(B) X - 1/2 = 6 + 1/2X
1/2X =6 + 1/2
1/2X = (12+1)/2
X = (2 x 13)/2
X = 13