Read the following sections: "Define Linear Equations in One Variable" and "Solutions to Linear Equations in One Variable." Then, scroll down to "Exercises," and complete exercises 1-5. Click on the "Show Solution" link for each problem to check your answer.
An important point to take away from this reading is that equation is defined as a statement (containing a variable), which may or may not be true, depending on the value of the variable. To solve an equation means to find all the values of the variable for which the statement is true. In the following subunits, you will focus on finding these values.