ccalhoun437 ccalhoun437 03-05-2020 Mathematics contestada PLS HELP I WILL GIVE BRAINLIIEST Which equation results from adding the equations in this system? x + 6 y = 9. -x + 2 y = -15. A) 8 y = negative 6 B) 8 y = 6 C) 4 y = 24 D) 4 y = negative 6