Mr. Swanson needs new strings for his 19 violin students. Each violin has 4 strings. Strings are $2 each and come in sets of 4. Mr. Swanson decides to buy 2 sets of strings for each student.

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.