Constructing equations from proportions to solve problems | Algebra Basics | Khan Academy

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We're putting some nifty thinking to work as we use proportions to create equations which then tell us how much tip to leave for dinner. Created by Sal Khan.

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

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This be arithmetic, , , , I asked for Calculus

jimmidge
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$52 * 1.25 = total amount he needs to leave

JosephANagyJr