Note: See lower down the page for problems using 2 variables to solve.
These are Simple Interest Problems are solved using one variable.
Investment Simple Interest 1 - 1 variable (invest1-1var.mp4): A total of $8,000 is deposited in 2 simple interest accounts. The annual interest rate is 12% in one account and 10% in the other account. The total annual interest earned was $900. How much was invested in each account? http://youtu.be/7i_35zNMsjg
Investment Simple Interest 2 - 1 variable (invest2-1var.mp4): A total of $7,000 was invested in two simple interest accounts such that the annual interest earned in each account was the same. The interest rates of the accounts were 15% and 20%. How much was invested in each account? http://youtu.be/ieCNfN7Uwog
Investment Simple Interest 3 - 1 variable (invest3-1var.mp4): Tim invested some money into a 10% annual simple interest account. In a 16% account, he invested $4000 more than what he put in the 10% account. He earned a total of $2200 in interest from these investments after one year. How much was deposited into each account? http://youtu.be/kt0lp7RHob4
These are Simple Interest Problems are solved using a system of variables with two variables. The first two problems are solved using one variable above.
Investment Simple Interest 1 - 2 variables (invest1-2var.mp4): ): A total of $8,000 is deposited in 2 simple interest accounts. The annual interest rate is 12% in one account and 10% in the other account. The total annual interest earned was $900. How much was invested in each account? http://youtu.be/9tFz4FYlcn8
Investment Simple Interest 2 - 2 variables (invest2-2var.mp4): A total of $7,000 was invested in two simple interest accounts such that the annual interest earned in each account was the same. The interest rates of the accounts were 15% and 20%. How much was invested in each account? http://youtu.be/vOwOFbVcMGo