SOLUTION: How many terms must be added in an arithmetic sequence whose first term is 19 and whose common difference is 6 to obtain a sum of 4012​?

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Question 1102887: How many terms must be added in an arithmetic sequence whose first term is 19 and whose common difference is 6 to obtain a sum of 4012​?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
%28n%2F2%29%281919%2B1919%2B66%28n-1%29%29=4012
Just simplify and solve for n.