Knowing how to solve a system of linear equations is an absolute must for algebra students.  There are four basic ways you can solve a linear system:

* graphing method ( not really practical – only used to teach the concept of solutions to a system)

* substitution method (learn it, love it, don’t forget it)

* elimination / linear combination method (learn it, love it, don’t forget it)

* solving systems using matrices ( important, know it however not as easy as the substitution method and the elimination method )

The main point that I’m making is invest in knowing how to solve systems- as you gain experience you’ll see that each method has it’s advantages. Good luck!!

 

 

 

some key topics that involve solving systems using the substitution method:

* geometry- solving various problems that involve systems
* linear programming
* word problems that involve two variables
* SAT and ACT exams
* more complex college prep math