Anyone wanna talk? i am in school

What is the answer to this question?

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

Why do businesses rely more on teamwork in today’s business environment? a. teams need fewer instructions. b. teams facilitate learning. c. teams create a harmonious environment at the workplace. d. the team’s collective output is greater than the total of each individual’s output. e. teams require lesser supervision