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4. 46.000
6. x
Kali silang
4x =6*46.000
4x. =279.000
x. =279.000:4
x. =69.000
untuk nomor 9
1 Kali pertemuan = 45.000
15 Kali pertemuan = x
Kali silang
1x = 15*45.000
1x =675.00
x. = 675.000