document.write( "Question 53098: Allen bought 20 stamps at the post office in 37 cent and 20 cent denominations. If the total cost of the stamps was $7.06 how many 37 cent stamps did Allen buy? No book. Thanks so much! \n" ); document.write( "
Algebra.Com's Answer #35398 by funmath(2933)![]() ![]() ![]() You can put this solution on YOUR website! Let the number of 37 cent stamps=x \n" ); document.write( "Let the rest of the 20 stamps be the 20 cent stamps=20-x \n" ); document.write( "The cost of 37 cent stamps =.37x \n" ); document.write( "The cost of 20 cent stamps=.20(20-x) \n" ); document.write( "The total cost =7.06 \n" ); document.write( ".37x+.20(20-x)=7.06 \n" ); document.write( "100(.37x+.20(20-x))=100(7.06) \n" ); document.write( "37x+20(20-x)=706 \n" ); document.write( "37x+400-20x=706\r \n" ); document.write( "\n" ); document.write( "17x+400=706 \n" ); document.write( "17x+400-400=706-400 \n" ); document.write( "17x=306 \n" ); document.write( "17x/17=306/17 \n" ); document.write( "x=18 \n" ); document.write( "Allen bought 18 37 cent stamps! (They didn't ask this time, but that means he only bought 2 20 cent stamps.) \n" ); document.write( " \n" ); document.write( " |