Respuesta :

Answer:

The answer D) because you add the same variable's which leave you with 2x-4

Step-by-step explanation:

first do positive 7-4-1=2. after that do the variables which get you 2x+1x+1x=4x

keenandavidthompson

Answer:

The answer D

Step-by-step explanation:

hope this helps :)