Respuesta :

choixongdong
7)
17x + 3 = 54
17x = 51
    x = 3

4y - 3 = 57
4y = 60
  y = 15

8)
4x - 3 = 45
4x = 48
  x = 12

180 - 45 - 41 = 84
11y + 6 = 94
11y = 88
    y = 8