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10 hari ⇒ x pekerja
berlaku perbandingan berballik nilai
18/10 = x/15
⇒ 9/5 = x/15
⇒ x = 9/5 × 15
⇒ x = 27 orang
Jadi, tambahan pekerja = 27 - 15
= 12 orang
Terimakasih semoga membantu