document.write( "Question 1162779: A collection of nickels, dimes, and quarters consist of 8 coins with a total of $1.30. If the number of dimes is equal to the number of nickels, find the number of each type of coins. \n" ); document.write( "

Algebra.Com's Answer #786638 by MathTherapy(10552) $\"\"$ $\"About$

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A collection of nickels, dimes, and quarters consist of 8 coins with a total of $1.30. If the number of dimes is equal to the number of nickels, find the number of each type of coins.
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Quite a few tutors have been PREACHING on here, the need to solve problems like these using ONE VARIABLE. I guess some who continue to use multiple 
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document.write( "variables - the likes of the other person who responded - don't feel that they need to learn the most efficient and least complex way to solutions.
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document.write( "I would suggest that you don't solve this problem his way!\r
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document.write( "Let the number of dimes be D
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document.write( "Then the number of nickels is also D
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document.write( "Therefore, the  number of quarters = 8 - (D + D), or 8 - 2D
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document.write( "We then get the following VALUE equation: .1D + .05D + .25(8 - 2D) = 1.3
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document.write( ".1D + .05D + 2 - .5D = 1.3
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document.write( "- .35D = - .7
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document.write( "Number of dimes, or 
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document.write( "Number of nickles: 2 ALSO
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document.write( "Do you think you can now find the number of quarters? \n" );
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