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

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> 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      Log On


   

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) About Me  (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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