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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Algebra.Com's Answer #49364 by checkley75(3666)\"\" \"About 
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3c+g=175
\n" ); document.write( "2c+4g=200 now multipy the first equation by -4 & add thus
\n" ); document.write( "-12c-4g=-700
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\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
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