SOLUTION: christy has a coin collection consisting of nickels and dimes. she has 28 coins worth $2.25. how many of each type of coin does she have?

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Question 406601: christy has a coin collection consisting of nickels and dimes. she has 28 coins worth $2.25. how many of each type of coin does she have?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
nickels x
dimes 28-x

Total 28
Value 2.25 = 225 cents
5*x+10*(28-x)= 225
5x+280- 10x=225
-5x=-55
/5
x=11 Nickels

Dimes 17