2007 AMC 10A Problems/Problem 5
Problem
The school store sells 7 pencils and 8 notebooks for . It also sells 5 pencils and 3 notebooks for . How much do 16 pencils and 10 notebooks cost?
Solution
We let cost of pencils in cents, number of notebooks in cents. Then
Subtracting these equations yields . Backwards solving gives . Thus the answer is .
See also
2007 AMC 10A (Problems • Answer Key • Resources) | ||
Preceded by Problem 4 |
Followed by Problem 6 | |
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All AMC 10 Problems and Solutions |
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