Answers fast . 1.) y=x−63x+2y=8 use the substitution method. a.) (4, −2) b.) (14, 8) c.) (0, −6) d.) (3, −3) 2.) what is the x-coordinate of the solution for the system of equations? {y−x=910+2x=−2y x= what? 3.) what is the y-coordinate of the solution for the system of equations? {y=3x−1x−y=−9 y=what?