document.write( "Question 145296: Allen bought 56 stamps at the post office in 37 cent and 20 cent denominations. If the total cost of the stamps was $18, how many of each denomination did Allen buy? \n" ); document.write( "
Algebra.Com's Answer #105969 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! B=# of 37c stamps \n" ); document.write( "L=# of 20c stamps \n" ); document.write( "B+L = 56 \n" ); document.write( "37B+20L = 1800 \n" ); document.write( "------------ \n" ); document.write( "B=56-L \n" ); document.write( "Substitute for B \n" ); document.write( "37(56-L)+20L=1800 \n" ); document.write( "2072-37L+20L=1800 \n" ); document.write( "2072-17L=1800 \n" ); document.write( "-17L=-272 \n" ); document.write( "L=16 \n" ); document.write( "----- \n" ); document.write( "B=56-L \n" ); document.write( "B=40 \n" ); document.write( " \n" ); document.write( " |