At rate 7% and 4%

Question

Phyllis invested dollars, a portion earning a simple interest rate of percent per year and the rest earning a rate of percent per year. After one year the total interest earned on these investments was dollars. How much money did she invest at each rate?

At rate percent :      

Answer 1

split 22,000$ in half

4%av 11,000=440$

7%av 11,000=770$

770+440=1,210$