# Systems of Linear Equations

# Systems of Linear Equations Topics

## Systems of Linear Equations explanations, examples, practice problems. Ready? Let’s do this.

#### Systems of Equations

A system of equations is a group of two or more equations. What, you were expecting robots?Sample ProblemThe two equationsform a system of equations.Another Sample ProblemThe three equationsalso fo...

#### Systems of Linear Equations

For most of this unit we'll be concerned with linear systems of equations, or systems of equations in which all the equations are linear.
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These systems are nice because we can graph each equa...

#### Solving Linear Systems

Now, of course, comes the big question: if we're asked to solve a system of linear equalities and not told how, which method do we use? Oh, sorry. No, we're not going to ask you to prom. We meant t...

#### Word Problems and Lines

Lots of word problems can be solved with systems of linear equations. However, before we bother with those, let's look at some word problems that describe single lines, and we're not referring to o...

#### More About Word Problems

The word problems we looked at in the previous section were obvious. They practically shouted out, "Look! I'm a word problem and I'm talking about two lines!'' Aside from their outbursts being need...

#### In the Real World

Systems of equations can be amazingly useful. How else would you figure out how many ounces of 70% dark chocolate and 20% milk chocolate you need to mix to get one pound (16 oz) of 40% chocolate? W...