Shayna and Jacob are selling cheesecakes for a school fundraiser. Customers can buy pecan cheesecakes and chocolate marble cheesecakes. Shayna sold 1 pecan cheesecake and 4 chocolate marble cheesecakes for a total of $81. Jacob sold 4 pecan cheesecakes and 2 chocolate marble cheesecakes for a total of $58. Find the cost each of one pecan cheesecake and one chocolate marble cheesecakeYOU HAVE TO DO ELIMINATION