Respuesta :

Pandapando
-2(3)(5+3-8-3(3))
=-6(5+3-8-9)
=-30-18+48+54
=54
sortingsteering

Answer: 54.

Step-by-step explanation: To solve this problem, we only need to substitute n=3 in the given equation and calculate, the procedure is shown as follows:

-2n(5+n-8-3n)

with n=3:

-2(3)(5+3-8-3(3))=

-6(-9)=

54

So, when n=3 the expression equals 54.