document.write( "Question 150090: Solving the formula L=2d+pi(a+r) for a. \n" ); document.write( "
Algebra.Com's Answer #110162 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! The idea is to isolate 'a' to one side of the equation -- doesn't matter which side. \n" ); document.write( ". \n" ); document.write( "L=2d+pi(a+r) \n" ); document.write( "Start by subtracting 2d from both sides to get: \n" ); document.write( "L-2d = pi(a+r) \n" ); document.write( ". \n" ); document.write( "Now, divide both sides by pi: \n" ); document.write( "(L-2d)/pi = a+r \n" ); document.write( ". \n" ); document.write( "Finally subtract r from both sides: \n" ); document.write( "((L-2d)/pi) - r = a \n" ); document.write( " \n" ); document.write( " |