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biasa = y
x + y = 350 ⇔ y = 350 - x
50000x + 30000y = 13000000
subtirusikan
50000x + 30000(350 - x) = 13000000
50000x + 10500000 - 30000x = 13000000
50000x - 30000x = 13000000 - 10500000
20000x = 2500000
x =
x = 125
jadi banyak kursi VIP = 125 kursi