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2 monitor + 9 monitor = 9.900.000
11 monitor = 9.900.000
monitor = 900.000
lapot = 3x monitor
laptop = 3x 900.000
laptop = 2.700.000
n = 3m
=> 2m + 3(3m) = Rp. 9.900.000
=> 2m + 9m = Rp. 9.900.000
=> 11m = Rp. 9.900.000
=> m = 900.000
n = 3m
n = 3.Rp. 900.000
n = Rp. 2.700.000
Jadi harga sebuah laptop adalah Rp. 2.700.000