Question 985850
THE WHOLE SOLUTION IS HERE:
<a href="http://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.985630.html">SAME  IDENTICAL PROBLEM, Already Solved, http://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.985630.html</a>