literal equation: solve Q=(N-S)/N for N (can't get answer)

Simple patterns, variables, the order of operations, simplification, evaluation, linear equations and graphs, etc.
gloar
Posts: 1
Joined: Wed Apr 07, 2010 2:45 pm
Contact:

literal equation: solve Q=(N-S)/N for N (can't get answer)

Postby gloar » Wed Apr 07, 2010 2:59 pm

been working on this problem for a while and am stuck! equation is Q=(N-S)/N, I started by multiplying both sides by N and got QN=N-S, then divided both sides by Q and got N=(N-S)/Q, this is where I am stuck am not sure how to "get rid of" the N in N-S. The answer in the book is N=S/(1-Q), but I can not get it
Please Help!

slim
Posts: 2
Joined: Sat Apr 03, 2010 10:33 pm

Re: lateral equation

Postby slim » Wed Apr 07, 2010 3:31 pm

Go back to:
QN = N - S

Add S to both sides and subtract QN from both sides

S = N - QN
S = N(1 - Q) {factor an N out}
N = S/1-Q {divide both sides by (1- Q)


Return to “Pre-Algebra”