How can you have 2 dollars in nickels dimes and quarters with the same amount of each coin?

Since 8 quarters equals $2, you must have fewer than 8 quarters. You can start with a guess and then refine it.

If you have 5 quarters, that is $1.25. Then, 5 dimes is $0.50 and 5 nickels is $0.25. The total of $1.25 + 0.50 + 0.25 = 2.00.