I have some dimes and nickels in my pocket. I have 39 coins that total $3.10. How many of each coins do i have?

Question

i need a system of equations to represent the situation. and i need to solve it.

Answer 1

let D for Dimes and N for Nickels

 

D+N=39

0.1D+0.05N=3.10

 

then:

D=23 and N=16