How to solve systems of three equations with elimination?
1.) Solve the equations so that they are in the same format. For instance, solve your set so that they are in the form x+y=5 or x+y+z=5. This will make it easier to add the equations together to eliminate a variable. 2.) Determine if a variable can be eliminated. The terms must be exact opposites in order to cancel out. You will only use two systems at a time.
