\[\begin{array}{rl}A=\pi r^2+\pi rs&\text{Isolate the variable term by adding the opposite of }\pi r^2 \\ A+\color{blue}{(-\pi r^2)}\color{black}{}=\pi r^2+\pi rs+\color{blue}{(-\pi r^2)}\color{black}...\[\begin{array}{rl}A=\pi r^2+\pi rs&\text{Isolate the variable term by adding the opposite of }\pi r^2 \\ A+\color{blue}{(-\pi r^2)}\color{black}{}=\pi r^2+\pi rs+\color{blue}{(-\pi r^2)}\color{black}{}&\text{Simplify} \\ A-\pi r^2=\pi rs&\text{Isolate }s\text{ by multiplying by the reciprocal of }\pi r \\ \color{blue}{\frac{1}{\pi r}}\color{black}{}\cdot(A-\pi r^2)=\pi rs\cdot\color{blue}{\frac{1}{\pi r}}\color{black}{}&\text{Simplify} \\ \frac{A-\pi r^2}{\pi r}=s&\text{Rewrite with }s\text{ o…
