Algebra 1 Part 2

HW 9/17:
  
Visit this website:  http://www.coolmath.com/algebra/Algebra1/08System2x2/03_substitution.htm

Read the examples on the page.

Then click on "crunch some" and find 4 problems to solve.  Write them down, solve them, and use the 
website to check your answers.

You may choose any 4 problems, so if you don't like one that comes up, just click again for a new 
problem.