If you can show your work on how to do these that would be great. I tend to learn and understand better when I see how it is being solved. Thank you!

9. Suppose that you invest a total of $7000 in two accounts. One account earns simple interest at the rate of 2% per year and the other earns simple interest at the rate of 12% per year. If your total interest earned in one year was $280, how much was invested in each account? 10. Suppose that you invest money in two accounts. One account earns simple interest at the rate of 1% per year and the other earns simple interest at the rate of 2% per year. You invested twice as much in the 1% interest account as in the 2% interest account. Your total amount of interest earned after one year was $240. How much was invested in each account