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.
elsa borrowed $15,000 to buy a truck for her business. she borrowed from her parents who charge her 2% simple interest. she
borrowed from a credit union that charges 4% simple interest, and she borrowed from a bank that charges 7% simple interest.
she borrowed three times as much from her parents as from the bank, and the amount of interest she paid at the end of 1 yr was
$555. how much did she borrow from each source?