document.write( "Question 1074548: A stamp collection consists of 5 cent, 8 cent, and 13 cent stamps. The number of 13 cent stamps is one more than twice the number of 5 cent stamps. The number of 13 cent stamps is six more than the number of 8 cent stamps. The total value of all the stamps is $5.37. Find the number of 5 cent stamps. \n" ); document.write( "
Algebra.Com's Answer #689372 by jorel1380(3719)![]() ![]() You can put this solution on YOUR website! Let n be the number of 5-cent stamps. Then the number of 13-cent stamps is 2n+1; and the number of 8-cent stamps is 2n+1-6, or 2n-5. So: \n" ); document.write( "5n+8(2n-5)+13(2n+1)=537 \n" ); document.write( "47n-27=537 \n" ); document.write( "47n=564 \n" ); document.write( "n=12 \n" ); document.write( "There are 12 5-cent stamps in the collection. ☺☺☺☺ \n" ); document.write( " |