Set up a system of equations to solve each of the following problems. Complete parts (a) though (d) below. (a) A tire store sold two types of tires, a sports tire and an all-season tire. The sum of six times the sports tire and five times the all-season tire is 93, and the difference between three-quarters of the sports tire and two-thirds of all-season tires is zero. For the store manager, find the number of each type of tire sold in one day. The number of sports tires is , and the number of all-season tires is