I think it’s the second choice
For this case, we have the following expression:

We simplify the expression:
If we add similar terms, taking into account that different signs are subtracted and the sign of the greater one is placed, we have that 
So, we have to:

Answer:
-3x + x + 5 = -2x + 5
Answer:
i think no sorry if im whrong
A. never
because you are limiting x from 0 to infinite, and all of these are positive.