document.write( "Question 478805: pls. help me solve this prob. tnx.\r
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\n" ); document.write( "\n" ); document.write( "sam paid 30 dollars for 4 markers and 3 files. A marker cost 1.60 dollars less than a file.\r
\n" ); document.write( "\n" ); document.write( "a. find the cost of each marker
\n" ); document.write( "b. find the cost of each file
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Algebra.Com's Answer #328062 by nerdybill(7384)\"\" \"About 
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sam paid 30 dollars for 4 markers and 3 files. A marker cost 1.60 dollars less than a file.
\n" ); document.write( "a. find the cost of each marker
\n" ); document.write( "b. find the cost of each file
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\n" ); document.write( "Let f = cost of a file
\n" ); document.write( "then
\n" ); document.write( "f-1.60 = cost of marker
\n" ); document.write( "our equation:
\n" ); document.write( "4(f-1.60) + 3f = 30
\n" ); document.write( "4f-6.40 + 3f = 30
\n" ); document.write( "7f-6.40 = 30
\n" ); document.write( "7f = 36.40
\n" ); document.write( "f = $5.20 (cost of file)
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\n" ); document.write( "Cost of marker:
\n" ); document.write( "f-1.60 = 5.20-1.60 = $3.60\r
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