document.write( "Question 12023: A collection of 30 coins worth $5.50 consists of nickles, dimes, and quarters. There are twice as many dimes as nickles. How many quarters are there? \n" ); document.write( "
Algebra.Com's Answer #11619 by stanbon!(97)![]() ![]() ![]() You can put this solution on YOUR website! Let number of nickels be \"x\". \n" ); document.write( "Then number of dimes is \"2x\". \n" ); document.write( "And number of quarters is \"30-3x\" \n" ); document.write( "Value of nickels is (5)x cents \n" ); document.write( "Value dimes is (10)2x = 20x cents \n" ); document.write( "Value of quarters is (25)(30-3x)= 750-75x cents \n" ); document.write( "EQUATION: \n" ); document.write( "Value of nickels + Value of dimes + Value of quarters = 550 cents \n" ); document.write( " 5x + 20x + 750-75x = 550 \n" ); document.write( " -50 x = -200 \n" ); document.write( " x = 4 (number of nickels) \n" ); document.write( " 2x = 8 (number of dimes) \n" ); document.write( " 30-3x = 30-12 = 18 (number of quarters)\r \n" ); document.write( "\n" ); document.write( "Cheers, \n" ); document.write( "Stan H.\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |