kak tolong jawb no 2

Mapel : Matematika
Kelas : 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