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4c + 5k = 200.000 x2
# 8c + 12k = 440.000
8c + 10k = 400.000 -
2k = 40.000
k = 20.000
# 2c + 3k = 110.000
2c + 3(20.000) = 110.000
2c + 60.000 = 110.000
2c = 110.000-60.000
2c = 50.000
c = 25.000
* 6c + 5k
= 6 (25.000) + 5 (20.000)
= 150.000 + 100.000
= Rp. 250.000