Rebecca has 45 coins, all nickels and dimes. The total value of the coins is $3.60. How many

of each type of coin does Rebecca have?

Rebecca has 18 nickels and 27 dimes

Step-by-step explanation:

Let x be the number of nickels Rebecca has, then 45-x is the number of dimes she has.

The total value of Rebecca's coins is $3.60.

1 nickel - 5 cents

x nickels - 5x cents

1 dime - 10 cents

45-x dimes - 10 (45-x) cents

Total x nickels and 45-x dimes is 5x+10 (45-x) cents that is $3.60=360 cents. So,

5x+10 (45-x) = 360

5x+450-10x=360

5x-10x=360-450

-5x=-90

5x=90

x=18

45-x=45-18=27