SOLUTION: There are nickles and dimes in a collection of coins. There are twice as many nickles as dimes. The total value of the coins is $1.20. Find the number of each coin. How do i so

Question 252611: There are nickles and dimes in a collection of coins. There are twice as many nickles as dimes. The total value of the coins is $1.20. Find the number of each coin.
How do i solve this? I did a let statement but I think its wrong because my equation isn't working out...
Answer by hokies(65) (Show Source): You can put this solution on YOUR website!
Let d=dimes and n=nickels. You have two unknowns (d and n) so you need two equations.
n = 2*d (twice as many dimes as nickels)
d*.1 + n*.05 = 1.20 (total value equals the value from the dimes and nickels)
solve these two equations:
n=12 and d=6
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