document.write( "Question 553250: Eldora and finn went to an office supply store together. Eldora bought 15 boxes and paper clips and 7 packages of index cards for a total of $55.40.Finn bought 12 boxes of paper clips and 10 packages of index cards for a total cost of $61.70 find the cost of one box of paper clips and the cost of one package of index cars \n" ); document.write( "
Algebra.Com's Answer #360754 by mananth(16946)\"\" \"About 
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paper clips boxes $ x
\n" ); document.write( "Index card packets $ y 0
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\n" ); document.write( "15 x + 7 y = 55.5 .............1
\n" ); document.write( "12 x + 10 y = 61.7 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -10
\n" ); document.write( "Multiply (2) by 7
\n" ); document.write( "-150 x -70 y = -555
\n" ); document.write( "84 x 70 y = 431.9
\n" ); document.write( "Add the two equations
\n" ); document.write( "-66 x = -123.1
\n" ); document.write( "/ -66
\n" ); document.write( "x = 1.87
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "15 x + 7 y = 55.5
\n" ); document.write( "27.98 + 7 y = 55.5
\n" ); document.write( " 7 y = 55.5-27.98
\n" ); document.write( " 7 y = 27.52
\n" ); document.write( " y = 3.93
\n" ); document.write( "paper clips boxes $ 1 .87
\n" ); document.write( "Index card packets $ 3 .93
\n" ); document.write( "m.ananth@hotmail.ca
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