Jawabanmu

2014-04-12T20:22:55+07:00
DP/PA=DC/PQ
⇒8/12=DC/14
⇒(perkalian silang) ⇔ 12DC=112
⇒DC=9.3
maaf kalo salah ,
intinya itu rumusnya ....
2014-04-13T06:02:32+07:00
(12DC + 8.20) : (8+12) = 14 12DC + 160 = 14.20 12DC + 160 = 280 12DC = 280-160 12DC = 120 DC = 120 :12 DC = 10