SOLUTION: Mary Jo spends $1,980 to buy stock in two companies. She pays $26 a share to one of the companies and $20 a share to the other. If she ends up with a total of 90 shares, how many s

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Question 1095258: Mary Jo spends $1,980 to buy stock in two companies. She pays $26 a share to one of the companies and $20 a share to the other. If she ends up with a total of 90 shares, how many shares did she buy at $26 a share and how many did she buy at $20 a share?
She bought ( ) shares at $26 and ( )
shares at $20.
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
90 shares, total
x at $20 each
90-x at $26 each

The cost: 20x%2B26%2890-x%29=1980
Solve for x and evaluate 90-x.