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Matematika SMP Kelas VII
25 hari x 48 orang = 20 hari x a
a = 1.200 / 20
a = 60 orang
Kelas : VII SMP
Bab : Perbandingan
Pembahasan :
Hari | Pekerja | Hasil kali
25 | 48 | 1200
20 | 48 + x | 20(48 + x)
1200 = 20(48 + x)
1200 = 960 + 20x
20x = 240
x = 12 tambahan pekerja
Banyak pekerja = 48 + 12 = 60 pekerja