document.write( "Question 69339: Sally bought three chocolate bars and a pack of gum and paid $1.75. Jake bought two chocolate bars and four packs of gum and paid $2.00. Find the cost of a chocolate bar and the cost of a pack of gum.\r
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document.write( "Please help solve \n" );
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Algebra.Com's Answer #49364 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! 3c+g=175 \n" ); document.write( "2c+4g=200 now multipy the first equation by -4 & add thus \n" ); document.write( "-12c-4g=-700 \n" ); document.write( "------------------------------------- \n" ); document.write( "-10c=-500 \n" ); document.write( "c=-500/-10 \n" ); document.write( "c=50 cost of 1 chocolate bar. now substitute 50 for c & solve for g. \n" ); document.write( "3*50+g=175 \n" ); document.write( "150+g=175 \n" ); document.write( "g=175-150 \n" ); document.write( "g=25 cost of 1 pack of gum. \n" ); document.write( "proof \n" ); document.write( "2*50+4*25=200 \n" ); document.write( "100+100=200 \n" ); document.write( "200=200 \n" ); document.write( " |