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Verified answer
8 orang = 15 harix orang = 12 hari
15×8/12 = 120/12 = 10 pekerja
■ 12 hari y orang
12y = 15 × 8
12y = 120
y = 120/12
y = 10 orang
Yang perlu ditambahkan = 10 - 8
= 2 orang