Asked by Sab
Rearrange r+s/8s=r-s/8n to make r the subject.
OK, I have started by rearranging the formula:
8n(r+s)=8s(r-s)
What do I do next?
OK, I have started by rearranging the formula:
8n(r+s)=8s(r-s)
What do I do next?
Answers
Answered by
Reiny
so you must have meant
(r+s)/(8s)=(r-s)/(8n)
so 8n(r+s)=8s(r-s) is correct so far. Le'ts expand it
8nr + 8rs = 8rs - 8s^2
8nr = -8s^2
nr = -s^2
r = -s^2/n
(r+s)/(8s)=(r-s)/(8n)
so 8n(r+s)=8s(r-s) is correct so far. Le'ts expand it
8nr + 8rs = 8rs - 8s^2
8nr = -8s^2
nr = -s^2
r = -s^2/n
Answered by
Sab
thank you!
Answered by
Sab
just realised, should the second line be
8nr+8NS?, not 8rs?
8nr+8NS?, not 8rs?
Answered by
Sab
just realised, should the second line be
8nr+8NS?, not 8rs?.........
8nr+8NS?, not 8rs?.........
Answered by
Reiny
your are right, good for you to notice
I have to mind my n, r and s's
8nr + 8ns = 8rs - 8s^2
collect all terms containing r to one side
8nr - 8rs = -8s^2 - 8ns
factor out the r
r(8n - 8s) = -8s^2 - 8ns
r = (-8s^2 - 8ns)/(8n - 8s)
divide top and bottom by 8 on the RS
r = (-s^2 - ns)/(n-s)
or -s(s+n)/(n-s)
I have to mind my n, r and s's
8nr + 8ns = 8rs - 8s^2
collect all terms containing r to one side
8nr - 8rs = -8s^2 - 8ns
factor out the r
r(8n - 8s) = -8s^2 - 8ns
r = (-8s^2 - 8ns)/(8n - 8s)
divide top and bottom by 8 on the RS
r = (-s^2 - ns)/(n-s)
or -s(s+n)/(n-s)
Answered by
Sab
great, that makes sense, thanks
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.