Respuesta :

4x - 5y = 1     Subtract 4x from both sides

4x - 4x  - 5y = 1 - 4x

- 5t = 1 - 4x     Or more conventionally

-5x = -4x + 1    Divide by - 5

y = -4x/-5 + 1/-5

y = (4/5) x - 1/5