Find how many of each there are?

Question

A Parking meter contains dimes and nickles worth $4.75. There are 71 coins in all. Find how many of each there are?

 

How many dimes are there?

__dimes.

 

How many nickles are there?

___ nickles

Answer 1

D = number of dimes

N = number of nickles

 

write an equation to match each statement:

 

"...meter contains dimes and nickles worth $4.75"

Add the VALUE of the dimes to the VALUE of the nickles to get the total value:

     0.10D + 0.05N = 4.75

 

"There are 71 coins in all."

    D + N = 71

 

Now, solve the pair of equations