Question 697569
<pre>
Watch this youtube video first:

http://www.youtube.com/watch?v=l6_ghhd7kwQ

Then go to these sites to see step by step examples:

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=131529

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=148086

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=90856

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=631640

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=512996

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=164148

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=148086

http://www.algebra.com/cgi-bin/jump-to-question.mpl?question=427654

Edwin</pre>