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48 25
60 x
48/60 .25 =20
Maka pekerjaan tersebut akan selesai dalam waktu 20 hari...
60 = y(misal)
itu nama nya berbalik nilai,jadi : bukan kali silang tapi, kalil lurus
60 x y = 48 x 25
60y = 1200
y = 1200/60
y = 20