SOLUTION: Jimmy has 15 coins in his pocket. They were dimes and nickels. The total value of the coins is $1.30. How many dimes are in the pocket? It tells me to put it into two equations,

Question 312758: Jimmy has 15 coins in his pocket. They were dimes and nickels. The total value of the coins is $1.30. How many dimes are in the pocket?
It tells me to put it into two equations, but I dont know HOW to put it in equation form.
Answer by Edwin McCravy(20081) (Show Source): You can put this solution on YOUR website!


The first equation is a COIN equation:

D + N = 15

The second equation is a money equation:

$.10D + $.05N = $1.30

or thinking of it in pennies,

  10D + 5N = 130

So you have the systen of equations:



Can you solve that system?  If not post again asking how.

Solve that and get D=11, N=4

11 dimes is $1.10 and 4 nickes is $.20 a total of $1.30, so it checks.

Edwin

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