Caleb and Sergio stacked boxes on a shelf. Caleb lifted 14 boxes and Sergio lifted 12 boxes. The boxes that Sergio lifted each weighed 10 lb more than the boxes Caleb lifted. Let c represent the weight of each box Caleb lifted. What expression represents the total number of pounds Sergio lifted?
Since Caleb lifted 14 boxes and c is the weight of Caleb's boxes, then Caleb lifted 14c pounds. Since Sergio lifted 12 boxes, and his boxes are 10lb heavier, he carries 12(c+10) or 12c+120
