# Math - Help!!

7x over 8 (fraction = 21

I don't know how to solve this.

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3. 👁 449
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

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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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