SOLUTION: A store sells small notebooks for ​$8 and large notebooks for ​$16. If a student buys 6 notebooks and spends ​$72​, how many of each size did he​ buy?

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: A store sells small notebooks for ​$8 and large notebooks for ​$16. If a student buys 6 notebooks and spends ​$72​, how many of each size did he​ buy?      Log On


   

Question 990205: A store sells small notebooks for ​$8 and large notebooks for ​$16. If a student buys 6 notebooks and spends ​$72​, how many of each size did he​ buy?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A store sells small notebooks for ​$8 and large notebooks for ​$16. If a student buys 6 notebooks and spends ​$72​, how many of each size did he​ buy?
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Equation:
S + L = 6 notebooks
8S + 16L = 72 dollars
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Modify::
S + L = 6
S + 2L = 9
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Subtract to get:
L = 3 (# of large notebooks bought)
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S = 6-3 = 3 (# of small notebooks bought)
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Cheers,
Stan H.
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