Question

ayuda por favor
¿elimina los signos de agrupacion y resuelve ?

Answer 1

Explicación paso a paso:

Usamos ley de signos si es necesario

55.

-8-{-7y+[-6y+4z-(2t-3y+5z)]+3}

= -8-{-7y+[-6y+4z-2t+3y-5z]+3}

= -8-{-7y-6y+4z-2t+3y-5z+3}

= -8+7y+6y-4z+2t-3y+5z-3

= -11+10y+z+2t

56.

3y²+5y-(4y²+5)-8y²-(-7y-3y²)

= 3y²+5y-4y²-5-8y²+7y+3y²

= -6y²-5+12y

57.

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

= 7z-[2z+y+5y-3z+9]-12z

= 7z-2z-y-5y+3z-9-12z

= -4z-6y-9

58.

{-7/10t-[-3u-(3/4t-8u)-6/5t+5u]+9/2t}

= {-7/10t-[-3u-3/4t+8u-6/5t+5u]+9/2t}

= {-7/10t+3u+3/4t-8u+6/5t-5u+9/2t}

= -7/10t+3u+3/4t-8u+6/5t-5u+9/2t

= 23/4t-10u