Question

solve the formula for the specified variable. a = p(1 + nr) for r (a) r = \frac{pn}{a - p} (b) r = \frac{a}{n} (c) r = \frac{a - p}{pn} (d) r = \frac{p - a}{pn}

Explanation:

Step1: Expand the right - hand side

$A = P+Pnr$

Step2: Isolate the term with $r$

$A - P=Pnr$

Step3: Solve for $r$

$r=\frac{A - P}{Pn}$

Answer:

C. $r=\frac{A - P}{Pn}$