document.write( "Question 80782: 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. \n" ); document.write( "
Algebra.Com's Answer #57933 by vertciel(183)\"\" \"About 
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Let's denote:\r
\n" ); document.write( "\n" ); document.write( "1 Chocolate bar = b\r
\n" ); document.write( "\n" ); document.write( "1 Pack of Gum = g\r
\n" ); document.write( "\n" ); document.write( "Now, let's express Sally's and Jake's purchases with these variables.\r
\n" ); document.write( "\n" ); document.write( "3b + g = 1.75 ----(1)\r
\n" ); document.write( "\n" ); document.write( "2b + 4g = 2.00 ---(2)\r
\n" ); document.write( "\n" ); document.write( "So now we have a system of two equations.\r
\n" ); document.write( "\n" ); document.write( "Do you know how to solve for variables in a system of equations? If you don't, please write back.\r
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