Set up a system of linear equations to represent the scenario. Solve the system by using Gaussian elimination or Gauss-Jordan elimination. Assume the interest rates are annual.

Amanda borrowed $15,000 to buy a truck for her business. She borrowed from her parents who charge her 3simple interest. She borrowed from a credit union that charges 6% simple interest, and she borrowed from a bank that charges 2% simple interest. She borrowed two times as much from her parents as from the bank, and the amount of interest she paid at the end of 1 yr was $650. How much did she borrow from each source?

Amanda borrowed $__:from her parents, $___ from the credit union , and $___ from the bank.