SOLUTION: Carolyn has $3.15 in her purse in nickels and dimes. The number of nickels is 7 less than three times the number of dimes. Find the number of each type of coin

Algebra ->  Customizable Word Problem Solvers  -> Coins -> SOLUTION: Carolyn has $3.15 in her purse in nickels and dimes. The number of nickels is 7 less than three times the number of dimes. Find the number of each type of coin      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1080294: Carolyn has $3.15 in her purse in nickels and dimes. The number of nickels is 7 less than three times the number of dimes. Find the number of each type of coin
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!

10d%2B5%283d-7%29=315
2d%2B3d-7=63
5d=63%2B7=70
highlight%28d=14%29DIMES

n=3d-7
n=3%2A14-7
highlight%28n=35%29NICKELS


-
14*0.1+35*0.05=1.4+1.75=3.15