Teddy is selling cookie dough and popcorn for a fundraiser. Cookie dough is $10 and popcorn is $6. Teddy sold 87 items for a total of $646. How many containers of cookie dough did teddy sell?

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.