An investor has two fund accounts earning 8% and 9% simple interest. The total investment is $15,000 and the annual interest is $1,280. Write system of two linear equations in two variables for this problem. Use variablex

xfor the amount invested at 8% and variabley

yfor the amount invested at 9%. How much is invested at each rate?

The system of equations is:

x+y=____

___x+___y=____