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Verified answer
Mapel : MatematikaKelas : VII SMP
Bab : Perbandingan
Pembahasan :
A = 2B
1/x = 1/A + 1/B
1/x = (A + B)/AB
x = AB/(A + B)
6 = 2B²/3B
6 = 2B/3
2B = 18
B = 9 hari
A = 2B
A = 2(9)
A = 18 hari