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Kelas 7 MatematikaBab Perbandingan dan Aritmatika Sosial
2 minggu = 14 hari
14 hari . 15 orang = (14 - 4) hari . a
a = 14 . 15/10
a = 210/10
a = 21 orang
Tambahan pekerja
= 21 - 15
= 6 orang