Tolong bantu aku nomer 2 :)))

2a)
Qd = Qs
51 – 3P = 6P – 10
-3P – 6P = -10 – 51
-9P = -61
P = (-61) / (-9)
P = 61/9
P = 6 7/9

Q = 51 – 3P
Q = 51 – 3(61/9)
Q = 51 – 61/3
Q = 153/3 – 61/3
Q = 92/3
Q = 30 2/3

2.b)
Qd = Qs
30 – 2P = -6 + 5P
-2P – 5P = -6 – 30
-7P = -36
P = 36/7
P = 5 1/7

Q = 30 – 2P
Q = 30 – 2(36/7)
Q = 30 – 72/7
Q = 210/7 – 72/7
Q = 138/7
Q = 19 5/7