Respuesta :

4x - 4a + 3b = 5x + a

-4a + 3b= 5x + a - 4x

-4a + 3b - a = x

-5a + 3b = x

4(x - a) + 3b = 5x + a

4x - 4a + 3b = 5x + a

3b - 4a - a = 5x - 4x

x = 3b - 5a