I'm in Algebra 2, 8th grade. This question is driving me nuts! My book and notes do not help at all.(adsbygoogle = window.adsbygoogle || []).push({});

The sum of a series is 2125. The first term is 43 and the last term is 127. How many terms are there, and what is the common difference?

I have no idea how to find the terms, because all of the equations I know have d in there.. and I don't know if I'm supposed to find the D first, or whatever.

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# Sum Of An Arithmetic Series

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