The opera house has 150 x 10 = <<150*10=1500>>1500 seats.

There are 1500 x 20/100 = <<1500*20/100=300>>300 seats that were not taken.

The total number of seats taken was 1500 - 300 = <<1500-300=1200>>1200.

Therefore, the opera house earned $10 x 1200 = $<<10*1200=12000>>12000 from one of the shows.

# Answer

12000
Question:
An opera house has 150 rows; each row has ten seats. The ticket costs $10 per show. How much did the opera house earn from one of the shows if 20% of the seats were not taken?
Answer:
Let's think step by step.

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12000
An opera house has 150 rows; each row has ten seats. The ticket costs $10 per show. How much did the opera house earn from one of the shows if 20% of the seats were not taken?
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