Question

solve the following formula for the specified variable.
$a = \frac{1}{2}f(r + z)$ for $r$
$r = \square$ (simplify your answer.)

Explanation:

Step1: Multiply both sides by 2

$2A = f(r+z)$

Step2: Divide both sides by f

$\frac{2A}{f}=r+z$

Step3: Subtract z from both sides

$r=\frac{2A}{f}-z$

Answer:

$r=\frac{2A}{f}-z$