document.write( "Question 272434: gary has a total of 27 dvd's and cd's. the number of dvd's is 3 less than twice the number of cd's. how many of each does he have? \n" ); document.write( "

Algebra.Com's Answer #199283 by oberobic(2304) $\"\"$ $\"About$

You can put this solution on YOUR website!
x = number of dvd
\n" ); document.write( "y = number of cd
\n" ); document.write( "x + y = 27
\n" ); document.write( "x = 2y - 3
\n" ); document.write( ".
\n" ); document.write( "set up a simultaneous equations
\n" ); document.write( "x + y = 27
\n" ); document.write( "x - 2y = -3
\n" ); document.write( "subtract
\n" ); document.write( "3y = 30
\n" ); document.write( "y = 10
\n" ); document.write( ".
\n" ); document.write( "so
\n" ); document.write( "x = 27 - 10 = 17
\n" ); document.write( ".
\n" ); document.write( "Answer:
\n" ); document.write( "10 CDs
\n" ); document.write( "17 DVDs
\n" ); document.write( ".
\n" ); document.write( "Done \n" ); document.write( "

\n" );