document.write( "Question 558198: Hello:
\n" ); document.write( "please help me fiqure out this word problem for future math problems with the step to perform: i do recall this problems but it has been a while since i done this word math problem
\n" ); document.write( "this is the problem: How much of an alloy that is 40% copper should be xixed with 500 ounce tha is 80% copper in order to get an alloy that is 60% copper. \n" ); document.write( "
Algebra.Com's Answer #854082 by MathTherapy(10801)\"\" \"About 
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document.write( " Hello:\r\n" );
document.write( "please help me fiqure out this word problem for future math problems with the step to perform: i do recall this problems\r\n" );
document.write( "but it has been a while since i done this word math problem\r\n" );
document.write( "this is the problem: How much of an alloy\r\n" );
document.write( "that is 40% copper should be xixed with 500 ounce tha is 80% copper in order to get an alloy that is 60% copper.\r\n" );
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document.write( "Adding a 40% substance to an existing 80% substance, to get a 60% substance results in an addition of the same amount of the\r\n" );
document.write( "INITIAL substance. In other words, Percent: \"%28%2280%25%22+%2B+%2240%25%22%29%2F2+=+%22120%25%22%2F2+=+%2260%25%22\", and AMOUNTS: \"%28500+%2B+500%29%2F2+=+%221%2C000%22%2F2+=+500\".\r\n" );
document.write( "So, amount of 40% copper to be added will be the INITIAL amount, 500 ounces.\r\n" );
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document.write( "The above is NOT STANDARD, so future mixture problems may definitley NOT be similar to this one. And, as you would like to\r\n" );
document.write( "\"fiqure out this word problem for future math problems with the step to perform...\", you can do this problem, as follows:\r\n" );
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document.write( "Let the amount of 40% copper to be added, be C\r\n" );
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document.write( "Percent of copper in INITIAL amount of alloy: 80, or .8\r\n" );
document.write( "Amount of copper in INITIAL amount of alloy: .8(500) = 400 oz\r\n" );
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document.write( "Percent of copper to be ADDED to INITIAL alloy: 40, or .4\r\n" );
document.write( "Amount of copper to be ADDED: .4C\r\n" );
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document.write( "Percent of copper in RESULTANT alloy: 60, or .6\r\n" );
document.write( "Amount of copper in RESULTANT alloy: .6(500 + C) = 300 + .6C\r\n" );
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document.write( "We then get: Initial amount of copper + ADDED amount of copper = RESULTANT amount uf copper, OR\r\n" );
document.write( "                                           400                +                     .4C                   =                 300 + .6C\r\n" );
document.write( "                                                                                                  .4C - .6C = 300 - 400\r\n" );
document.write( "                                                                                                         - .2C = - 100\r\n" );
document.write( "                                    Amount of copper to be ADDED to alloy, or \r\n" );
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document.write( "Some folks tend to use a table, which could prove to be more organized and easier to follow, But, that's up to you.
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