document.write( "Question 1050997: A coin box contains 50cents coin and $1 coins only. the total amount is $36. There are twice as many 50cents coins as $1 coins. How many 50cents coins are there in the box? \n" ); document.write( "
Algebra.Com's Answer #807698 by CubeyThePenguin(3113)![]() ![]() You can put this solution on YOUR website! h = number of 50 cent coins \n" ); document.write( "d = number of $1 coins\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0.5h + d = 36 \n" ); document.write( "h = 2d\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Substitute the second equation into the first equation.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "0.5(2d) + d = 36 \n" ); document.write( "2d = 36 \n" ); document.write( "d = 18\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are 36 fifty-cent coins and 18 one-dollar coins. \n" ); document.write( " |