This site defines the meaning of domain and range. It also shows how to find domain and range by looking at a function. It gives many examples and works the probelems. There is also a link for more domain and range problems on the page.
This web site provided by S.O.S Math explains how to solve Exponential Equations. It provides examples and step-by-step instructions on how to solve the examples.
Simplifying equations is often the first step to solving algebraic equations. Some methods that can be used to simplify an equation are explored on this web page.