Five Air-Conditioning Units Are Checked and Recharged with Refrigerant R-134a

Short Answer

Five air-conditioning units are checked and recharged with refrigerant R-134a. A full cylinder of R-134a contains 32 pounds of refrigerant. These amounts are taken from a full cylinder: 7 1/2 pounds, 8 2/3 pounds, 5 1/4 pounds, and 4 7/8 pounds. How many pounds of R-134a are left?