Respuesta :

musiclover10045

-7(3)-4y=-5

-21-4y=-5

-4y = 16

y=-4
if x = 3 
- 7x - 4y = -5 is the same as -7*3 - 4y = -5
hence -21 - 4y = -5
           4y = -16
             y = -4