document.write( "Question 624833: Joe has a collection of nickels and dimes that is worth $2.10. If the number of dimes was tripled and the number of nickels was increased by 24, the value of the coins would be $5.70. How many nickels and dimes does he have? \n" ); document.write( "
Algebra.Com's Answer #393091 by lwsshak3(11628)\"\" \"About 
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Joe has a collection of nickels and dimes that is worth $2.10. If the number of dimes was tripled and the number of nickels was increased by 24, the value of the coins would be $5.70. How many nickels and dimes does he have?
\n" ); document.write( "**
\n" ); document.write( "let x=Number of nickels
\n" ); document.write( "let y=Number of dimes
\n" ); document.write( "..
\n" ); document.write( ".05x+.10y=2.10
\n" ); document.write( ".05(x+24)+3*.10=5.70
\n" ); document.write( "..
\n" ); document.write( ".05x+.10y=2.10
\n" ); document.write( ".05x+1.2+.30y=5.70
\n" ); document.write( "..
\n" ); document.write( ".05x+.10y=2.10
\n" ); document.write( ".05x+.30y=4.50
\n" ); document.write( "subtract
\n" ); document.write( "-.2y=-2.4
\n" ); document.write( "y=12
\n" ); document.write( "..
\n" ); document.write( ".05x+.10y=2.10
\n" ); document.write( ".05x+1.2=2.1
\n" ); document.write( ".05x=2.1-1.2=.90
\n" ); document.write( "x=.90/.05
\n" ); document.write( "x=18
\n" ); document.write( "Number of nickels=18
\n" ); document.write( "Number of dimes=12 \n" ); document.write( "
\n" );