Question 169530
Make p the subject of the formula: d = p/(l+p)

In other words, solve for p.  This is a literal equation.

Multiplying both sides by (l + p), we get:

dl + pd = p

We now subtract pd from both sides of the equation.

This is done to get both p letters on the same side.

dl = p - pd....Do you see that we now have both p letters on the right side?

We now factor the right side.

dl = p(1 - d)

To isolate p, we divide both sides of the equation by the quantity (1 - d).
This quantity is our coefficient (in this case).

dl/(1 - d)

Final answer:

p = dl/(1 - d)