Answer
$4500$ dollars at $2\%$, $3500$ dollars at $5\%$ .
Work Step by Step
Step 1. Assume the investment for the $2\%$ account is $x$ dollars. Then the amount left for the $5\%$ account is $8000-x$.
Step 2. The difference in interest is given by $0.05(8000-x)-0.02x=85$ or $0.07x=315$; thus $x=4500$
Step 3. The investment for the $2\%$ account is $4500$ dollars and the investment for the $5\%$ account is $3500$ dollars.
