Respuesta :

Answer:

x = y = 13, z = 18

Step-by-step explanation:

6x + 8 = 86

6x = 86 - 8 = 78, so x = 78/6 = 13

7y + 3 + 86 = 180

7y = 180 - 86 - 3 = 91

y = 91/7 = 13

5z + 4 + 86 = 180

5z = 180 - 86 - 4 = 90

z = 90/5 = 18