Please find a video on systems of equations in three variables below as well as one on systems of inequalities immediately below. I encourage you to take a moment and critically view them, pausing and re-watching when needed.The documents for our first unit are embedded beneath that, including the next two homework assignments.

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**Systems of Three Variables:**

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**Graphical Systems Application Problem**:

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__Linear Programming Example:__

__Linear Programming Example:__

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__Documents from our first unit:__

__Documents from our first unit:__

Its good to learn the linear equation by videos.Almost every students used substitution method for solving linear equations but very few use graphical method which needs time but its a very interesting way of solving the linear equation.

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