Posted by ASDFGHJKL; on Thursday, November 10, 2011 at 5:10am.
There is no L in your formula.
You seem to be confusing 1, l and L.
You still need to know how to use parentheses to avoid ambiguity in typed equations.
Oh sorry yes thats what i mean:
S = (n/2)*(a+L)
S = (n/2)*(a+L)
S/(n/2) = a + L
2*S / n = a + L
(2*S / n) - a = L , or
L = (2*S / n) - a
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