This topic is in the 'Solving and Graphing Linear Inequalities' section. If you've got equations down, then inequalities are the place to challenge yourself. Inequalities look a lot like equations actually, but instead of an equal sign, you have to work with an inequality symbol like >, <, ≥, or ≤. You'll see in the tutorials for this section how a lot of the techniques that work for equations work for inequalities, and so you could just start off the problem by imagining that the inequality symbol is replaced by an equals sign. There is one major difference though, and that has to do with multiplying or dividing both sides of the inequality by a negative. When you do that the inequality flips, so make sure you watch out for that in the tutorials for this section!
This topic, Solving and Graphing 'AND' Compound Inequalities, is a part of Compound Inequalities.