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(p-2):w = 3:2 |x3 ==> 9:6
p:w:(p-2) = 10:6:9
p/(p-2) = 10/9
9p = 10p - 20
p = 20
total tamu sebelum ada yang pulang = (10+6)/10 x 20 = 32 orang
total tamu setelah 2 orang pria pulang = 32-2 = 30 orang