Question 996142
Express the equation THIS way:
{{{A=pi*r*L+pi*r^2}}}  or in pure text, A=pi*r*L+pi*r^2.


Isolate the term with L in it, according to Addition Property of Equality...
{{{A+(-pi*r^2)=pi*r*L+(-pi*r^2)}}}
{{{A-pi*r^2=pi*r*L}}}


Isolate L using Multiplication Property of Equality and applying Multiplicative Inverse...
{{{(A-pi*r^2)(1/(pi*r))=(pi*r*L)(1/(pi*r))}}}
{{{highlight((A-pi*r^2)/(pi*r)=L)}}}