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20 January, 18:23

4r + 9r - 11r + 7r

Simfly the expressions by combing like terms?

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Answers (2)
  1. 20 January, 18:26
    0
    Solve this one in exactly the same way as I solved the one

    that you posted 1 minute before this one.

    - - add up all the ' r 's.

    - - add up all of the just-plain-numbers

    This time, the answer looks like 9r.

    You should spend a few minutes with it so that

    you know where this answer comes from.
  2. 20 January, 18:29
    0
    9r because 4+9 is 13+7 is 20-11 is 9
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