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document.write( "the cost of three note books and four pencils is $8.50.the cost of five notebooks and eight pencils is $14.50. determine the cost of one notebook and the cost of one pencil \n" );
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Algebra.Com's Answer #448186 by checkley79(3341)![]() ![]() ![]() You can put this solution on YOUR website! 3N+4P=8.50 MULTIPLY BY -2 & ADD. \n" ); document.write( "5N+8P=14.50 \n" ); document.write( "-6N-8P=-17.00 \n" ); document.write( "--------------------- \n" ); document.write( "-N=-2.50 \n" ); document.write( "N=$2.50 ANS. FOR THE PRICE OF 1 NOTEBOOK \n" ); document.write( "3*2.50+4P=8.50 \n" ); document.write( "7.50+4P=8.50 \n" ); document.write( "4P=8.50-7.50 \n" ); document.write( "4P=1.00 \n" ); document.write( "P=1.00/4 \n" ); document.write( "P=.$25 ANS. FOR THE COST OF 1 PENCIL. \n" ); document.write( "PROOF: \n" ); document.write( "5*2.50+4*.25=8.50 \n" ); document.write( "7.50+1.00=8.50 \n" ); document.write( "8.50=8.50 \n" ); document.write( " |