document.write( "Question 88031: John buys stamps. Some are 33 cents and the rest are 20 cents. The total equals 4.50. \n" ); document.write( "
Algebra.Com's Answer #64059 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! Some are 33 cents and the rest are 20 cents. The total equals 4.50. \n" ); document.write( ": \n" ); document.write( "Let x = no. of 33 cent stamps, y = no. 20 cent stamps, keep everything in cents \n" ); document.write( "33x + 20y = 450 \n" ); document.write( ": \n" ); document.write( "Assuming there are at least 2 ea 20 cent stamps: (450-40)/33 = 12.4 \n" ); document.write( "We can assume the number of 33 stamps is less than 13 \n" ); document.write( "Try 12: 33*12 = 396, 450 - 396 = 54, not a multiply of 20 \n" ); document.write( "assume it has to be an even number \n" ); document.write( "Try 10: 33*10 = 330, 450 - 330 = 120, bingo! \n" ); document.write( ": \n" ); document.write( "We have 10 ea 33 cent and 6 ea 20 cent stamps \n" ); document.write( " \n" ); document.write( " |