document.write( "Question 1078772: needs to prepare 28 ounces of a 9% hydrochloric acid solution. find the amount of 14% solution and the amount of 7% solution she should mix. how many ounces of the 14% acid solution should be in the mixture?
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Algebra.Com's Answer #693169 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

I think you should use 2 unknowns:\r\n" );
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document.write( "Get rid of the decimals by moving them all 2 places to the right:\r\n" );
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document.write( "Now we can divide the second equation through by 7\r\n" );
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document.write( "Multiply the first equation through by -1\r\n" );
document.write( "to eliminate the y's\r\n" );
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document.write( "So we must use 8 ounces of the 14% \r\n" );
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document.write( "Substitute x = 8 in \r\n" );
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document.write( "And we must use 20 ounces of the 7%.\r\n" );
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document.write( "Edwin

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