John received $9,000 in student loans. Part of the money he was able to borrow 7% simple interest, but on the rest of the money he was charged 8.25% simple interest. At the end of the year he owed $706.25 in interest. How much did John borrow at each rate?
0.07x+0.0825(9000-x)=706.25 Solve for x X=2900 at 7% 9000-2900=6100 at 8.25%