9x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 109x + 20y = 10

Respuesta :

9x + 20y = 109x + 20y

9x = 109x

109x - 9x = 0

100x = 0

x = 0