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8 June, 13:26

Ted bought seven CDs. A week later half of all his CDs were destroyed in a fire. There are now only 20 CDs left. With how many did he start?

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  1. 8 June, 15:33
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    Answer: 33 CDs

    Since half the CDs were destroyed, you need to find the total CDs Ted had before the fire.

    20 CDs = 1/2 of what Ted had

    20*2=40 CDs

    Now, subtract 7 from the 40 CDs to find the amount he had in the beginning.

    40-7=33
  2. 8 June, 15:37
    0
    33CDs

    20 is half. 40 he had after buying 7. 40-7 is 33.
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