Question

ayudaa pls 7z-[(2z+y)-(-5y+3z)+9]-12z

Answer 1

Respuesta:

- 4z - 6y -9

Explicación paso a paso:

$7z-\left(\left(2z+y\right)-\left(-5y+3z\right)+9\right)-12z\\\\7z-\left(2z+y-\left(-5y+3z\right)+9\right)-12z\\\\7z-\left(6y+9-z\right)-12z\\\\7z+z-6y-9-12z\\\\-4z-6y-9$

Espero te ayude :3