Math
posted by cole on .
Rosa invested $8000 for one year, part ast 8% annual interest and the balance at 10% annual interest. Her total interest for the year was $700. How much money did she invest at each rate?

8000=LR + HR (lower rate $, higherrate$)
.08*LR+ .10HR=700
solve for LR, HR. 
LR 56
HR 70