SOLUTION: If s=2(n-2),find n when s=18

Algebra.Com
Question 1053862: If s=2(n-2),find n when s=18
Found 2 solutions by Fombitz, addingup:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!




Answer by addingup(3677)   (Show Source): You can put this solution on YOUR website!
So you are saying that:
18 = 2(n-2)
then:
18 = 2n-4
22 = 2n flip it around to isolate the unknown on the left
2n = 22
n = 11

RELATED QUESTIONS

S=180(N-2)... (answered by unlockmath)
find the sum when N=20 ,A=2 and D=5 for... (answered by ewatrrr)
S=n/2(2a(n-1)d) (answered by mananth,ikleyn)
if P(n,2)=110 find... (answered by math_tutor2020,Theo,ikleyn)
find n if... (answered by math_helper)
If s=n/2(2a+(n-1)d)express d in terms of a,n and S (answered by ikleyn)
S(n) is a function that squares numbers. Find S(13) WHEN S(n)= n to the second... (answered by Tatiana_Stebko)
If S=3/2+5/4+7/8+...+(2n+1)/2^n+... where n=1, 2, 3, ..., then find the value of... (answered by math_helper)
n = 2*10^(3 t). When t=0.104, find n. (answered by tommyt3rd)