# Simplifying Expressions

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• Well, what's the question, Bob?
• Hey Doc, I need to ask you a question for math.
• Ok I'll do everything step by step on my chalkboard in my office.
• Do you know how to simplify the expression: –17 – t – (t + 3)
• –17 – t – (t + 3)  -3                               -3 -20  - t - t                    -20  -2t
• You subtract 3 from (t +3) and also subtract it from -17 so then the three is gone and -17 turns into -20....
• So to explain what I did will be on the TV.
• And then you have -t - t which is basically  - t + (-t) which is -2t, and so then you put the -2t and -20 into an expression which would be -20 - 2t.
• FIN
• Thanks, Doc I'm going to leave now.
• No Problem, Bob.
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