Question

solve P=as/a+s for S

Answer 1

\[ P= \frac{as}{a+s}\]Like that?

Answer 2

yes

Answer 3

Cross multiply:
\[P(a+s) = as\]
Simplify:
\[Pa+Ps = as\]
Bring the "s" on one side of the equation:
\[Ps - as = Pa\]Do you get till here?

Answer 4

ok

Answer 5

Alright. Now take "s" as common:
\[s(P - a) = Pa\]
Agree?

Answer 6

yes

Answer 7

Now last step, cross multiply to get rid of that parenthesis on left.