looking to get a couple of brief explanations on two questions in regards to algebra and dealing with matrix equations.

looking to get a couple of brief explanations on two questions in regards to algebra and dealing with matrix equations. Looking to describe a matrix equation along with an easy example to help me better understand the steps in solving a matrix equation. So basically the two questions are, What is a Matrix Equation, give an example? How do we solve a Matrix Equation? Thank you for your help.