document.write( "Question 89189: 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 chocolate bar and the cost of a pack of gum. \n" ); document.write( "
Algebra.Com's Answer #64809 by stanbon(75887)\"\" \"About 
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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 chocolate bar and the cost of a pack of gum.
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\n" ); document.write( "Let \"c\" be the cost of a chocolate bar; Let \"p\" be the cost of a pack of gum.
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\n" ); document.write( "EQUATION:
\n" ); document.write( "3c+p = 1.75
\n" ); document.write( "2c+4p = 2.00
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\n" ); document.write( "Multiply the 1st equation by 4 to get:
\n" ); document.write( "12c+4p = 7
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\n" ); document.write( "Subtract the 2nd equation from that result to solve for c:
\n" ); document.write( "10c = 5
\n" ); document.write( "c = $0.50 (price of a chocolate bar)
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\n" ); document.write( "Substitute into 3c+p = 1.75 to solve for p:
\n" ); document.write( "3(0.50)+p = 1.75
\n" ); document.write( "1.50 + p = 1.75
\n" ); document.write( "p = $0.25 (price of a pack of gum)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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