Respuesta :

Answer:

N=7a-3

A) a-16

U) -5a-9

Step-by-step explanation:

First you need to group the like terms

for example

-7a+2a-4-5

Next

You need to subtract the numbers -4-5 so it equals

-9

Add the rest -7a+2a=-5a

Where your answer would then be -5a-9

Hope this helps I only did the first 3 for you!