3 equations to solve the problem

Jerry Rice, who played the majority of his career with the San Francisco 49ers and the Oakland Raiders, holds the all- time record for touchdown( TD) passes caught. Jerry caught 30 more TD passes from Steve Young than he did from Joe Montana. Jerry caught 39 more TD passes from Joe Montana than he did from Rich Gannon. Jerry caught a total of 159 TD passes from Young, Montana, and Gannon.