document.write( "Question 1157918: you dump out your piggy bank and find that you have only nickels and dimes. there are a total of 50 coins and the coins add up to 3.90 how many nickles do you have ? \n" ); document.write( "

Algebra.Com's Answer #780819 by MathTherapy(10555) $\"\"$ $\"About$

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\n" ); document.write( "you dump out your piggy bank and find that you have only nickels and dimes. there are a total of 50 coins and the coins add up to 3.90 how many nickles [sic] do you have ?
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Let number of nickels be N
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document.write( "Then number of dimes = 50 - N
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document.write( "We then get: .05N + .1(50 - N) = 3.9
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document.write( ".05N + 5 - .1N = 3.9
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document.write( ".05N - .1N = 3.9 - 5
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document.write( "- .05N = - 1.1
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document.write( "Number of nickels, or  \n" );
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