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  • today we are learning how to simplify algebraic expressions. try to solve the problem on the board
  • You can demonstrate how you got the answer on the board!
  • –17 – t – (t + 3)
  • I have the answer!
  • For the simplified expression, I had -20+(2t) or -20-2t
  • -20 + (-2t)  or -20-2t
  • –17+ (-2t) + (-3)
  • –17+ (-t)  +  (-t) + (-3)
  • –17+ (-t)  + (– (t + 3))
  • –17 – t – (t + 3)
  • Then, I got rid of the parentheses from t and 3, making them also addition problems with negative signs.
  • First, I made all the subtraction problems additions ones with negative signs. 
  • After that, I grouped the like terms t, and the other set of like terms, which are the -17and -3. 
  • –17+ (-t)  +  (-t) + (-3)
  • –17+ (-t)  + (– (t + 3))
  • –17+ (-2t) + (-3)
  • –17 – t – (t + 3)
  • -20 + (-2t)  or -20-2t
  • Thank you for the demonstration!
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