Respuesta :

-3(-1)a - 4(-1)
3a + 4 <--------------Answer simplified
penfila11Pen
Hey there :)

-3xa - 4x

We are given x to be - 1

Therefore, we simply substitute
- 3 ( - 1 ) a - 4 ( - 1 )
3a + 4

There are no more like-terms, so that is your simplified form