1) Which ordered pair is the solution to the system of equations?
{x+y=−13x−y=21
(5.5, −6.5)
(10, −11)
(5, −6)
(7, −8)
{x+y=−13x−y=21
(5.5, −6.5)
(10, −11)
(5, −6)
(7, −8)
