Solving proportions 2 exercise examples | Algebra Basics | Khan Academy

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Created by Sal Khan.

Algebra basics on Khan Academy: Topics covered in a traditional college level introductory macroeconomics course

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I have an assessment on solving proportions tomorrow and this was my exact problem! Explained in literally the first minute, thank you so much!

Jenniespetcrocodile
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im a 26 year old college student and thats the first time anyone has ever explained cross multiplication! i feel really dumb right now.

endsley
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How did you get 17 for the first problem?

Plushy
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Anyone else find it funny how he says "both"? 

danielsanchez