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= 70/3 - 14/4 + 45/8
= 560/24 -84/24 + 135/24
= 611/24
p=2 1/2
q=4 2/3
r=-3/4
ditanya nilai 2pq+qr-3pr?
dijawab=38/6+47/12-51/4
-30/12 disederhanakan jadi -6/2 jadi -3 jawabannya