SOLUTION: I cannot figure a few word problems out and was wondering if you could help me set the two equations up. 1. How many gallons each of 15% alcohol and 30% alcohol should be mixed

Question 729515: I cannot figure a few word problems out and was wondering if you could help me set the two equations up.
1. How many gallons each of 15% alcohol and 30% alcohol should be mixed to get 30 gallons of 25% alcohol
2. A box contains $6.25 in nickles, dimes and quarters. There are 85 coins in all, with three times as many nickles as dimes. How many quarters are there

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Here are set-ups:
(1)
Let = gallons of 15% alcohol needed
Let = gallons of 30% alcohol needed
given:

-------------------------
(2)
Let = number of nickels in box
Let = number of quarters in box
given:

( in cents )

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