document.write( "Question 293388: Everyday, Lisa puts her spare change (nickels and dimes) in a piggy-bank. This
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document.write( "weekend she decides to count her savings. She finds that she has 72 coins with a total value of $4.95. How many dimes does she have? \n" );
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Algebra.Com's Answer #211792 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! (nickels and dimes) in a piggy-bank. This \n" ); document.write( "weekend she decides to count her savings. She finds that she has 72 coins with a total value of $4.95. How many dimes does she have? \n" ); document.write( "-------------- \n" ); document.write( "Quantity Equation: n + d = 72 \n" ); document.write( "Value Equation::: 5n+10d = 495 cents \n" ); document.write( "------------ \n" ); document.write( "Multiply thru the Quantity equation by 5 to get: \n" ); document.write( "5n + 5d = 5*72 \n" ); document.write( "5n +10d = 495 \n" ); document.write( "---- \n" ); document.write( "Subtract the 1st Eq. from the 2nd and solve for \"d\": \n" ); document.write( "5d = 495-5*72 \n" ); document.write( "5d = 135 \n" ); document.write( "d = 27 (# of dimes) \n" ); document.write( "====================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |