document.write( "Question 1096562: Alison paid $285 for 5 similar dvds and 9 similar cds. Janice paid $225 for 5 similar dvds and 5 similar cds. How much did Suzy pay for 5similar dvds and 6 similar cds? \n" ); document.write( "

Algebra.Com's Answer #710998 by ikleyn(52778) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "It follows directly from the condition that 4 cds cost $285 - $225 = $60.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Hence, 1 cd costs 60/4 = 15 dollars.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then 5 dvds cost 225 - 5*15 = 150 dollars and 1 dvd costs 30 dollars.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "From this point you can easily complete the solution on your own.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The lesson to learn from the solution is THIS:\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "

\r\n" );
document.write( "    You NEITHER need solve the system of equations NOR a single equation to get the answer.\r\n" );
document.write( "\r\n" );
document.write( "    With the given condition, you can solve the problem MENTALLY.\r\n" );
document.write( "

\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );