# Math Help - Shares of Stock

1. ## Shares of Stock

Tony bought a number of shares of stock for $720. A month later the value of the stock increased by$8 per share, and he sold all but 20 shares and received $800. How many shares did he sell and at what price per share? 2. Originally Posted by magentarita Tony bought a number of shares of stock for$720. A month later the value of the stock increased by $8 per share, and he sold all but 20 shares and received$800. How many shares did he sell and at what price per share?
Lets say he had x shares

And the price of each share = y

Total value for all stocks = 720$= xy Thus our first equation is xy= 720$

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After a month
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No. shares sold =x-20

rice of each share = y+ 8

Amount he received =(x-20)(y+8) = 800$Thus our second equation is (x-20)(y+8) = 800$

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Solve the two equations

x = 60 , y= 12

3. ## ok

Lets say he had x shares

And the price of each share = y

Total value for all stocks = 720$= xy Thus our first equation is xy= 720$

------------------------------
After a month
---------------------------
No. shares sold =x-20

rice of each share = y+ 8

Amount he received =(x-20)(y+8) = 800$Thus our second equation is (x-20)(y+8) = 800$

________________________________________________
Solve the two equations

x = 60 , y= 12