Question 61188
73- -12+ -4n-6-n    [substitute 7 for n and solve]
73- -12+ -4(7)-6-(7)
44
or 
73- -12+ -4n-6-n [combine like-terms first]
85-6+-5n
79-5n [now substitute 7 for n and solve]
79-5(7)
44