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Question 1048561: A person has $36,000 invested in Stock A and Stock B. Stock A currently sells for $30 a share and stock B sells for $60 a share. If stock B doubles in value and stock A goes up to 50%, his stock will be worth $69,000. How many shares of each stock does he own?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! 30A+60B=36000
45A+120B=69000
multiply first by -2
-60A-120B=-72000
45A+120B=69000
-15A=-3000
A=200 shares or $6000 of current amount
60B is worth $30,000, so there are 500 shares of B
A=200
B=500
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Check
If A is $45, then there is $9,000
if B is $120, then there is $60,000
They add to $69,000
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