<PRE><B>Question 701091</B>
A person has 17,000 invested in stock A and stock B. Stock A currently sells for $50 a share and stock B sells for $60 a share. If stock B doubles in value and stock A goes up 50%, his stock will be worth $31,500. How many shares of each stock does he own? 
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Quantity Eq: A + B = 17000 stocks
Value Eq: 1.5*50A +2*60B = 31,500 dollars
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Those are the equations you want.
Note; Word Problems are simple if you read carefully.
Just symbolize what the words tell you.
Cheers,
Stan H.</PRE>