document.write( "Question 363147: Janet has five fewer fifteen-cent stamps than twenty-cent stamps. If the total value of the stamps is $3.45, how many twenty-cent stamps does she have? \n" ); document.write( "
Algebra.Com's Answer #258935 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! .15x+.20y=3.45 \n" ); document.write( "x=y-5 \n" ); document.write( ".15(y-5)+.20y=3.45 \n" ); document.write( ".15y-.75+.20y=3.45 \n" ); document.write( ".35y=3.45+.75 \n" ); document.write( ".35y=4.20 \n" ); document.write( "y=4.20/.35 \n" ); document.write( "y=12 20 cent stamps. \n" ); document.write( "x=12-5=7 15 cent stamps \n" ); document.write( "Proof: \n" ); document.write( ".15*7+.20*12=3.45 \n" ); document.write( "1.05+2.40=3.45 \n" ); document.write( "3.45=3.45 \n" ); document.write( " \n" ); document.write( " |