document.write( "Question 362943: Mr. Lowe bought some three cent stamps and some two cent stamps. The total cost was $8.90. How many stamps of each kind did he buy if the total number was 345 stamps? \n" ); document.write( "
Algebra.Com's Answer #258830 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! X+Y=345 OR X=345-Y \n" ); document.write( ".02X+.03Y=8.90 \n" ); document.write( ".02(345-Y)+.03Y=8.90 \n" ); document.write( "6.90-.02Y+.03Y=8.90 \n" ); document.write( ".01Y=8.90-6.90 \n" ); document.write( ".01Y=2 \n" ); document.write( "Y=2/.01 \n" ); document.write( "Y=200 3 CENT STAMPS WERE BOUGHT. \n" ); document.write( "345-200=145 2 CENT STAMPS WERE BOUGHT. \n" ); document.write( "PROOF: \n" ); document.write( ",02*145+.03*200=8.90. \n" ); document.write( "2.90+6.00=8.890 \n" ); document.write( "8.90=8.90 \n" ); document.write( " |