nes'above are : parallel perpendicular neither substitution method to find the solution. Choose the correct answer. 3x + 2y = 9 y = 3x 3 (3x) + 2y = 9 9x + 2y = 9 3x + 2(3x) = 9 x=9 and y=2 3x + 6x = 9 9x = 9 y = 3(1) -9+9 v = 3 (9, 2) x = 1 (1. 3) 3x) + 2y" 9 x + 27 3x + 2(3x) = 9 3x + 6x = and y=2 9x = 9 y = 3(1 ) - 9 - 9 y = 3 x = 9 (9, 3)the substitution method to find the solution. Choose the correct answer. 6 y = -2x 5x + 6y = -7 5x + 6(- 2x) =- 7 5x + 6(- 2x) =-7 5x + 12x =-7 5x - 12x =- 7 y =- 2(1) 17x =- 7 y = - 2 - 7x =-7 17 + 17 + - 7 : - 7 X =- 17:1=-2 x = 1 (- 77. - 2) (1, 5x + 6(- 2x) =-7 5x - 12x =- 7 - 7x =-7 y =- 2(1) 5x + 6(- 2x) =-7 y = 2 5x + 12x =-7 : - 7 : - 17x =- 7 x = 1 : 17 + 17 (1, 2) X = TT; y =- 2 ( 77, - 2 ) Use the elimination method to find the solution. Choose the correct process. 7. 4x - 5y =9 -6x + 5y = -11 4x - 5y = 9 4x - 5y = 9 - 6x + 5y =- 11 add the two equations - 6x + 5y =- 11 add the two equations - 2x - 2 - 2x - 2 :- 2 :- 2 : - 2 - 2 x = 1 substitute x=1 into either equation x =-1 substitute x=-1 into either equation 4(1) - 5y = 9 4(- 1) - 5y = 9 4 - 5y = 9 - 4 - 5y = 9 4 - 4 + 4 + 4 - 5y = 5 - 5y = 13 :- 5 :-5 : - 5 : - 5 y =- 1 (1, -1) y : 13 (-1, - 13 )