document.write( "Question 766099: write a pair of simultaneous equations and use them to solve:\r
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document.write( "A wallet contains 34 notes, all of which are either $5 or $10 notes. the total value of the money is $285. how many $10 notes are there? \n" );
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Algebra.Com's Answer #466657 by mananth(16946)![]() ![]() You can put this solution on YOUR website! x= Number of $10 notes \n" ); document.write( "y= Number of $5 notes \n" ); document.write( " \n" ); document.write( "1 x + 1 y = 34 .............1 \n" ); document.write( "Total value \n" ); document.write( "10 x + 5 y = 285 .............2 \n" ); document.write( "Eliminate y \n" ); document.write( "multiply (1)by -5 \n" ); document.write( "Multiply (2) by 1 \n" ); document.write( "-5 x -5 y = -170 \n" ); document.write( "10 x + 5 y = 285 \n" ); document.write( "Add the two equations \n" ); document.write( "5 x = 115 \n" ); document.write( "/ 5 \n" ); document.write( "x = 23 \n" ); document.write( "plug value of x in (1) \n" ); document.write( "1 x + 1 y = 34 \n" ); document.write( "23 + y = 34 \n" ); document.write( " y = 34-23 \n" ); document.write( " y = 11 \n" ); document.write( " y = 11 \n" ); document.write( "x= 23 Number of $10 notes \n" ); document.write( "y= 11 Number of $5 notes \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " \n" ); document.write( " |