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Hi Barbra, I'll give you some help on the second problem and then you can finish it and try the first problem. Suppose a cookie cost C dollars and a bar cost B dollars. The first sentence then tells you that
The second sentence then becomes
You can solve the first equation for the cost of a cookie and get
Substitute this value for C into the second equation and you are left with an equation in the single variable B. Solve this equation for B. Penny | ||||||||||||
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