15Solving Simple Equations
Throughout this chapter, we'll be talking about equations. What's an equation? It's a mathematical statement that tells us that what is on one side of an equal sign (=) is equal to what's on the other side. For example, 3 + 4 = 7. The equations that need solving are ones that include a letter or symbol, called a variable, that stands for some unknown number. Solving is figuring out what the unknown is. In algebra, it's common to use letters like x, y, and z as variables, but variables aren't really new to you. If you can fill in the box in the problem below, you've solved for a variable.
This chapter will ask you ...
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