document.write( "Question 400460: A piggy bank contains 48 nickels and dime whose total is $4.50 how many coins are nickels?? \n" ); document.write( "
Algebra.Com's Answer #283475 by unlockmath(1688)\"\" \"About 
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Hello,
\n" ); document.write( "We can set up 2 equations (Let x be nickels and y be dimes)
\n" ); document.write( "x+y=48
\n" ); document.write( ".05x+.10y=$4.50
\n" ); document.write( "Let's do substitution and change the first equation as:
\n" ); document.write( "x=48-y
\n" ); document.write( "Now plug it in the second equation:
\n" ); document.write( ".05(48-y)+.10y=$4.50
\n" ); document.write( "Multiply this by 100 to remove the decimals:
\n" ); document.write( "5(48-y)+10y=450
\n" ); document.write( "rewrite this as:
\n" ); document.write( "240-5y+10y=450
\n" ); document.write( "Combine like terms, subtract 240:
\n" ); document.write( "5y=210
\n" ); document.write( "Divide by 5:
\n" ); document.write( "y=42 Dimes
\n" ); document.write( "we know there will be 6 nickels.
\n" ); document.write( "Make sense?
\n" ); document.write( "RJ
\n" ); document.write( "www.math-unlock.com \n" ); document.write( "
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