Using Linear Combinations to Solve Systems of Linear Equations

Another way to solve systems of linear equations is to use both equations simultaneously to create a single equation containing just one variable. Sometimes this is as simple as adding the two equations together and instantly eliminating one of the variables. Other times, you must multiply one or both of the equations by something to allow one of the variables to drop out of the picture. This method, though fun to use, may not always be the easiest way to solve a problem.

Tonight's homework: Read lesson 7.3 completely, and then complete problems 8-40 (first column only) and problems 43 and 44.