document.write( "Question 898621: 4 pens and 3 erasers cost rs 17,4 erazers and 3 pens cost rupees 18.findthe cost of pen and an eraser \n" ); document.write( "

Algebra.Com's Answer #544955 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "4p + 3e = 17
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document.write( "3p + 4e = 18\r
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document.write( " 12p + 9e = 51
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document.write( "-12p - 16e = -72
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document.write( "    -7e = -21
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document.write( "      e = 3,number of erasers.  p = 2  \n" );
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