Jim has 2.65 in nickels and dimes. He has 8 more nickels than dimes. How many of each kind of coin does he have?

Answer 1

Typical 2 variable/2 expression problem.

1st expression: d + 8 = n

2nd expression: 5n + 10d = 265

Substitute n for the equivalent value involving d from the 1st expression into the 2nd expression and solve for d. Once you know d, you can derive n.