Answer
$P=\frac{A}{(rt+1)}$
Work Step by Step
We are given that $A=Prt+P$. To solve for P, first use the distributive property to pull P out of both terms on the right side.
$A=(P\times r\times t)+(P\times1)=P(rt+1)$
Divide both sides by $(rt+1)$.
$P=\frac{A}{(rt+1)}$