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2p-q = 3 x 3 -----------> 6p-3q = 9
------------------ +
10p = 29
p = 2,9
2.2,9-q=3
5,8-q=3
q=5,8-3=2,8
q=2,8
(2p -q = 3) x 2⇒ 4p-2q =6
4p+3q=20 Dikurangi 4p-2q =6 ⇒ q=14
⇒2p-q=3
⇒2p-14=3
2p=3+14
2p=17
p=17/2=8.5
jawaban p=8,5