if the set {-49, -40, -31, -22, ..., x} xcontains 27 integers, what is x??

I know x = 185 not sure how to get it.
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2 Answers

that be ARITHMETIK SEQUENS

with start=-49, step size=-9, n=27

last number=-283, start+last=-332, averaej=-166

sum=-4482, smallest=-283, raenj=234
by
Woops, step size=+9

start=-49, end=185, start+last=136, averaej=68...averaej=(first+last)/2

sum=1,836  (sum=n*averaej)

raenj=234
by

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