Respuesta :
Xare,
3x - 6y = 24
x(-5) = -15x + 30y = -120 (1)
5x - 4y = 12
x(3) = 15x - 12y = 36 (2)
(1) + (2)
18y = - 84 y = - 84/18 = - 14/6
5x - 4(- 14/6) = 12
5x + 56/6 = 12
30x + 56 = 36
30x = 36 - 56
30x = - 20 x =- 20/30 x = - 2/3
3x - 6y = 24
x(-5) = -15x + 30y = -120 (1)
5x - 4y = 12
x(3) = 15x - 12y = 36 (2)
(1) + (2)
18y = - 84 y = - 84/18 = - 14/6
5x - 4(- 14/6) = 12
5x + 56/6 = 12
30x + 56 = 36
30x = 36 - 56
30x = - 20 x =- 20/30 x = - 2/3