Write two expressions (with at least two terms each) that when added together have a sum of -4n + 6.

Hello,
first of all, expression does not have any equal sign on it. as a result, here is your final answer that is equivalent to -4n+6:
-8n+4+4n+2
check:
combine like term
=-8n+4n+4+2
=-4n+6

2/
5n-6+12-9n
check:
combine like term:
5n-9n-6+12
=-4n+6. hope it !

4n+6=- i think that is right, because when you have a positive and a negative together it is a negative and then you subtract.