This unit discusses some general approaches to solving equations

This video explains several standard word problems that lead to simple simultaneous equations.
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One Step Equations

by Sal Khan
In this video Sal solves a number of examples of simple linear equations step by step.
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Two Step Equations

by Sal Khan
This video show multiple ways to solve slightly more complex linear equations, including one word problem.
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This video solves two warm up linear algebra problems in multiple ways and one complex word problem.
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This video solves two warm up equations with the same variable on both sides of the equation and one word problem.
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In this video one simple ratio problem is solved multiple ways. Two complex word problems are solved.
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In this video shows how to use a read and use a scaled diagram. It also solves a word problem involving ratios.
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Percent Problems

by Sal Khan
This video starts with one equation demonstrating how to move from a fraction to a percent, followed by 3 complex word problems.
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In this video three word problems solved. They involve volume, percentages, and using multiple variables.
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