conversations.from: human
conversations.value: Provide a step by step solution for the following math problem: Mr. Grey's house was worth $100,000. He sold the house to Mr. Brown at a profit of 10%. After one year, Mr. Brown sold the house to his other friend with a 10% loss. How much was Mr. Brown's selling price?
conversations.from: assistant
conversations.value: Mr. Grey had a $100 000 x 10/100 = $10,000 profit.
  So, Mr. Grey sold the house to Mr. Brown for $100 000 + $10 000 = $110,000.
  Mr. Brown sold the house $110 000 x 10/100 = $11,000 less than its purchased price.
  Thus, Mr. Brown sold it for $110 000 - $11 000 = $99,000 to his friend.