Hello I'm a newbie. I need help with my homework. I have ADD bad. I don't understand this section Could someone please show how to work these problems?

In eX 97-102., use the zero or rooot feature or the zooom and trace features of a graphing utility to approximate the solution of the logarithmic equation accurate to three decimal places.

99. logbase3 x+logbase3 (x-3)=1