document.write( "Question 273594: there are some 2 dollar and 50 cent coins in a purse.if the total number of coins is 17 and their total value is 22 dollar.find the number of 2 dollar coins and 50 cents coins \n" ); document.write( "
Algebra.Com's Answer #199808 by mananth(16946)\"\" \"About 
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there are some 2 dollar and 50 cent coins in a purse.if the total number of coins is 17 and their total value is 22 dollar.find the number of 2 dollar coins and 50 cents coins\r
\n" ); document.write( "\n" ); document.write( "Let the $2 coins be x, the 50 cent coins will be 17-x\r
\n" ); document.write( "\n" ); document.write( "$2-------------------------$0.5----------------- total\r
\n" ); document.write( "\n" ); document.write( "x--------------------------17-x------------------17 coins\r
\n" ); document.write( "\n" ); document.write( "2*x------------------------0.5(17-x)-------------22 dollars ( Value)\r
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\n" ); document.write( "\n" ); document.write( "2x+0.5(17-x)=22\r
\n" ); document.write( "\n" ); document.write( "2x+8.5-0.5x=22\r
\n" ); document.write( "\n" ); document.write( "1.5x=22-8.5\r
\n" ); document.write( "\n" ); document.write( "1.5x=13.5\r
\n" ); document.write( "\n" ); document.write( "x=13.5/1.5\r
\n" ); document.write( "\n" ); document.write( "x=9 = $2 coins\r
\n" ); document.write( "\n" ); document.write( "17-9=8 the number of 50 cent coins\r
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