document.write( "Question 162881: Ruth purchases some $.01 stamps, some $.15 stamps and some $.20 stamps. She has spend a total of $5.00. There are three times as many $.01 stamps as $.20 stamps and 8 more $.15 stamps than $.20 stamps. How many stamps in all does she buy? \n" ); document.write( "
Algebra.Com's Answer #120042 by checkley77(12844)![]() ![]() ![]() You can put this solution on YOUR website! .01*3X+.15(X+8)+.20X=5.00 \n" ); document.write( ".03X+.15X+1.2+.20X=5.00 \n" ); document.write( ".38X=5.00-1.20 \n" ); document.write( ".38X=3.80 \n" ); document.write( "X=3.80/.38 \n" ); document.write( "X=10 .20 CENT STANPS WERE PERDHASED. \n" ); document.write( "3*10=30 .01 CENT STAMPS WERE PURCHASED. \n" ); document.write( "10+8=18 .15 CENT STAMPS WERE PURCHASED. \n" ); document.write( "10+30+18=58 A TOTAL OF 58 STAMPS WERE PURCHASED. \n" ); document.write( "PROOF: \n" ); document.write( ".01*30+.15*18+.20*10=5.00 \n" ); document.write( ".30+2.70+2.00=5.00 \n" ); document.write( "5.00=5.00\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |