document.write( "Question 984767: A chemical solution contains 30% water and 70% alkali. What quantity of water needs to be added to 6 litres of solution so that water content become 40%? \n" ); document.write( "
Algebra.Com's Answer #605596 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Let the amount of water be x\r\n" );
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document.write( "                                  Liters\r\n" );
document.write( "                                    of\r\n" );
document.write( "                      Percent      Pure\r\n" );
document.write( " Type       Liters     alkali     alkali   \r\n" );
document.write( "  of         of         as a        in\r\n" );
document.write( "liquid      liquid    decimal     liquid \r\n" );
document.write( "-------------------------------------------\r\n" );
document.write( "alkali        6        0.7      6(0.7)=4.2\r\n" );
document.write( "water         x        0.0      x(0.0)= 0\r\n" );
document.write( "-------------------------------------------\r\n" );
document.write( "mixture      6+x       0.4      0.4(6+x)\r\n" );
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document.write( " The equation comes from the last column.\r\n" );
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document.write( "                4.2 + 0 = 0.4(6+x)\r\n" );
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document.write( "Solve that and get 4.5 liters of water.\r\n" );
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document.write( "Edwin
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