document.write( "Question 352433: 2 diamond rings and 4 silver rings cost $1440. a diamond ring and a silver ring cost $660. how much does a silver ring cost ?\r
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document.write( "i know the answer is $60. we did it with process of elimination and could not figure out another way \r
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document.write( "we got 2x +4y=1440
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document.write( "x =y =660 \n" );
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Algebra.Com's Answer #251848 by mananth(16946)![]() ![]() You can put this solution on YOUR website! let diamond ring be $x \n" ); document.write( "Silver ring be $y \n" ); document.write( ".. \n" ); document.write( "2x+4y=1440.................1 \n" ); document.write( "x+y=660.....................2 \n" ); document.write( "... \n" ); document.write( "multiply (2) by -2 and add to (1) \n" ); document.write( "-2x-2y=-1320 \n" ); document.write( "add to (1) we get \n" ); document.write( "4y-2y=1440-1320 \n" ); document.write( "2y=120 \n" ); document.write( "y= $60 cost of silver ring. \n" ); document.write( ".... \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |