(94.50 - 18.50) ÷ f = a
f=family members
a=answer
I don't know how many family members there are, but you would just replace f with the amount.
10(x-5)=-80
10x-50=-80
+50 +50
10x=-30
/10 /10
x=-3
19 minutes I think just divide 323 and 17
What do you think and what have you previously learned on the subject?