SOLUTION: A coin purse has 20 coins consisting of dimes and nickles. It totals $1.40. How many nickles are there?

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Question 333724: A coin purse has 20 coins consisting of dimes and nickles. It totals $1.40. How many nickles are there?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let dimes be x
the nickels will be 20-x
..
total value = 140 cents
..
VALUE
10x+5(20-x)=140
10x+100-5x=140
5x=140-100
5x=40
x= 40/5
x= 8 dimes
nickels = 20-8=12