Respuesta :

Answer:

[tex] \frac{3}{4} b - \frac{1}{4} b + ( \frac{ - 1}{4} b) \\ = ( \frac{3}{4} - \frac{1}{4} - \frac{1}{4} )b \\ = ( \frac{1}{4} )b \\ = \frac{1}{4} b[/tex]