document.write( "Question 69790: A postal clerk sold 75 stamps, some of which were 5 cents and some were 8 cents. The total amount was $4.80. How many of each stamp was sold? \n" ); document.write( "
Algebra.Com's Answer #49727 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! E+F=75 E=75-F \n" ); document.write( "8E+5F=480 \n" ); document.write( "8(75-F)+5F=480 \n" ); document.write( "600-8F+5F=480 \n" ); document.write( "-8F+5F=480-600 \n" ); document.write( "-3F=-120 \n" ); document.write( "F=-120/-3 \n" ); document.write( "F=40 NUMBER OF FIVE CENT STAMPS. \n" ); document.write( "E+40=75 \n" ); document.write( "E=75-40 \n" ); document.write( "E=35 EIGHT CENT STAMPS \n" ); document.write( "PROOF \n" ); document.write( "8*35+5*40=480 \n" ); document.write( "280+200=480 \n" ); document.write( "480=480\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |