SOLUTION: Mary Jo spends $800 to buy stock in two companies. She pays $12 a share to one of the companies and $22 a share to the other. If she ends up with a total of 50 shares, how many sha

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Mary Jo spends $800 to buy stock in two companies. She pays $12 a share to one of the companies and $22 a share to the other. If she ends up with a total of 50 shares, how many sha      Log On


   

Question 1102784: Mary Jo spends $800 to buy stock in two companies. She pays $12 a share to one of the companies and $22 a share to the other. If she ends up with a total of 50 shares, how many shares did she buy at $12 a share and how many did she buy at $22 a share?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
Let a and b be the first company and second company, respectively. Then:
a+b=50
12a+22b=800
Solve for a and b
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