Sederhanakan !! A.p-q-q-p B.a+b-b-a C.3a-6a+2b-b D.2c-(c-d) E.5c-(c-d) F.12-(1-x) Tolongg di bantu ya ka,dengan caranya!!

A. p - q - q - p
= -q²

B. a + b - b - a
= 0

C. 3a - 6a + 2b - b
= -3a + b

D. 2c - (c - d)
= 2c - c + d
= c + d

E. 5c - (c - d)
= 5c - c + d
= 4c + d

F. 12 - (1 - x)
= 12 - 1 + x
= x + 11