document.write( "Question 34459: Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have? \n" ); document.write( "
Algebra.Com's Answer #20744 by mukhopadhyay(490)\"\" \"About 
You can put this solution on YOUR website!
Nickels = x
\n" ); document.write( "Dimes = y
\n" ); document.write( ".05x+ .10y = 5.65 (based on total collection)
\n" ); document.write( "=> 5x + 10y = 565.....(1)
\n" ); document.write( "(.10)(2y)+(x+8)(.05) = 10.45 (Based on adjusted collection)
\n" ); document.write( "=> .2y+.05x+.40 = 10.45
\n" ); document.write( "=> .2y+.05x = 10.05
\n" ); document.write( "=> 5x+20y = 1005.......(2)
\n" ); document.write( "(2) minus (1) gives,
\n" ); document.write( "10y = 440
\n" ); document.write( "=> y = 44;
\n" ); document.write( "From (1) 5x = 565-10y = 565-440 = 125
\n" ); document.write( "=> x = 125/5 = 25;
\n" ); document.write( "Answer: Number of dimes = 44;
\n" ); document.write( "
\n" );