Math
posted by Sephiroth on .
"Jeremy is cooking using a recipe that requires flour, sugar and water. For each cup of sugar that Jeremy uses, he needs to use two cups of flour. He needs to use 2 1/2 more cups of water than flour. He also needs to use 3 1/2 cups less sugar than water. Find the amount of flour, sugar, and water that Jeremy needs."
I tried the problem and got these three equations:
2f = s
w = f + 2.5
w  3.5 = s
The problem is (you've probably guessed it by now) that there is no set of matching variables to plug in. I have an exam tommorow and I am entirely lost. Please help.

Actually, I can't think of equations to model this problem, but what you've done shows that you understand the problem.
All I did from the first sentence was...
1c sugar
2c flour
That's directly from the first sentence. Then, it tells you that you need 2.5 more cups of water than flour, so just add that to the amount of flower. Check that with the sugar sentence, and it works out.
(It's strange that I can't think of equations for this problem. It would be interesting to see if someone else could.) 
Sorry, there's no flower involved. :P

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Thank you for your help. I'm still not entirely clear, but we'll probably go over the study guide before the exam, so I'll get a better understanding of it then. Once again, thank you for your help. :)