Question 271641
Liz received change of $1.15 in nickels and dimes at the supermarket. The cashier gave her back 20 coins. How many of each kind of coin did she received?


Let the number of nickel coins be x

Then the number of dimes will be 20-x


The value of nickesl will be 5x cents

The value of dimes will be 10(20-x) cents

5x+10(20-x) = 115 cents

5x+200 - 10x = 115

-5x = 115-200

-5x= -85

x= -85/-5

x= 17 = number of nickels.

Dimes will be 3 numbers


confirmation

3*10 + 17*5 = 115