Caleb placed $5,500 in three investments that pay an annual…
Caleb placed $5,500 in three investments that pay an annual interest of 4%, 5% and 7%. He placed twice as much money in the 7% investment as he did in the 4% investment. His total interest for the year is $320. Using a 3×3 system, determine the amount of money Caleb placed in each of the three investments. Given x = the investment at 4%, y = the investment at 5%, and z = the investment at 7%, give the answer in the format (x, y, z) if there is a solution and `no solution` if it cannot be solved. (space between `,` and `#`)