SOLUTION: s=(n)/(2)[2a+(n-1)d] make d subject of formula

Algebra ->  Equations -> SOLUTION: s=(n)/(2)[2a+(n-1)d] make d subject of formula      Log On


   

Question 214359: s=(n)/(2)[2a+(n-1)d] make d subject of formula
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
s+=+%28n%2F2%29%282a%2B%28n-1%29d%29 Multiply both sides by 2%2Fn
2s%2Fn+=+2a%2B%28n-1%29d Subtract 2a from both sides.
%282s%2Fn%29-2a+=+%28n-1%29d Simplify the left side.
%282s-2an%29%2Fn+=+%28n-1%29d Divide both sides by %28n-1%29
%282s-2an%29%2Fn%28n-1%29+=+d Simplify the left side.
d+=+2%28s-an%29%2F%28n%5E2-n%29