SOLUTION: Goodies Club recently ran a bake sale to raise charity. Donuts were sold for $0.50 a piece and the coffee for $0.70 per person. It is known that 120 items were sold and $68 collect
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Question 514493: Goodies Club recently ran a bake sale to raise charity. Donuts were sold for $0.50 a piece and the coffee for $0.70 per person. It is known that 120 items were sold and $68 collected. How many cups of coffee were sold?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Let 
be the number of donuts. Let 
be the number of cups of coffee. Then:
I converted dollars/cents to just cents because I don't like decimal coefficients.
Now all you have to do is solve the 2X2 system for )
. Hint: Solve the first equation for either variable in terms of the other and then use the substitution method.
John
My calculator said it, I believe it, that settles it
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