Now that we've covered at least a few examples of how we get equations from the physical world, it's time to work on solving those equations. Solving an equation means figuring out what values of the unknowns (the variables) will make the equality a true statement. Sometimes there is only one solution, and sometimes there are a number of solutions. How exciting to have different possibilities, eh? Speaking of different possibilities, sometimes the real world gives us relationships that are inequalities. These will be introduced in this chapter as we learn how to solve them.