conversations.from: human
conversations.value: If you double a number and add 5 to the result, then that's 20 more than half of the original number. What's the original number?
  What is the solution?
conversations.from: assistant
conversations.value: Let x be the original number.
  2*x+5=20+x/2
  2*x-x/2=15
  4*x-x=30
  3*x=30
  x=10