document.write( "Question 143289: Sorry, but i need help with this one also. Thank you in advance.\r
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document.write( "Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have? \n" );
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Algebra.Com's Answer #104269 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Joe has a collection of nickels and dimes that is worth $5.65. \n" ); document.write( "5n + 10d = 565 cents \n" ); document.write( "------------------------------- \n" ); document.write( "If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. \n" ); document.write( "5(n+8) + 10(2d) = 1045 cents \n" ); document.write( "5n+40 + 20d = 1045 \n" ); document.write( "------------------------------------- \n" ); document.write( "How many dimes does he have? \n" ); document.write( "------------------------------------- \n" ); document.write( "EQUATIONS: \n" ); document.write( "5n + 10d = 565 \n" ); document.write( "5n + 20d = 1005 \n" ); document.write( "---------------------- \n" ); document.write( "10d = 440 \n" ); document.write( "d = 44 (# of dimes) \n" ); document.write( "----------- \n" ); document.write( "Substitute into 5n+10d = 565 to solve for \"n\": \n" ); document.write( "5n +440 = 565 \n" ); document.write( "5n = 125 \n" ); document.write( "n = 25 (# of nickels) \n" ); document.write( "============================ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |