Math - Help!!

7x over 8 (fraction = 21


I don't know how to solve this.

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  1. Another way to write this is 7x/8 = 21

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    posted by Katalina
  2. multiply each side by 8

    7x = 168
    divide both sides by 7
    x = 168/7 = 24

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    posted by Reiny
  3. 7x/8 = 21

    Multiply both sides by 8.

    7x = 168

    x = 24

  4. How does 7x = 168?

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    posted by Katalina
  5. Oh, I get it now. Like this? :

    7x / 8 = 21
    x 8 x 8
    7x/7 = 168/7
    x = 24

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    posted by Katalina
  6. I don't like the presentation of your second line, but you last two lines are good

    If you want to show all your steps, I prefer this:

    7x/8 = 21
    (7x/8)(8) = 21(8)
    7x = 168
    7x/7 = 168/7
    x = 24

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    posted by Reiny
  7. Ok, thanks!

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    posted by Katalina

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