Pat invested a total of $3,000.  Part of the money was invested in a money market account that paid 10% simple annual interest, and the remainder of the money was invested in a fraud that paid 8% simple annual interest.  If the interest earned at the end of the first year from these investments was $256, how much did Pat invest at 10 % and how much at 8%?

Please show all work and note any sort of information (if necessary) you used to help come up with the answer.