document.write( "Question 4407: How many Kilograms of water must be added to 20 kilograms of a 10% salt solution to produce a 5% solution ?\r
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document.write( "Please help me with not only showing how this is done, but explaining the steps. I am terrible in math! \n" );
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Algebra.Com's Answer #2946 by guapa(62)![]() ![]() ![]() You can put this solution on YOUR website! Let x represent the amount of water to be added. \n" ); document.write( "You can use the following guideline: \n" ); document.write( "Amount of water in 10% + Amount of water added = Amount of water in 5% solution \n" ); document.write( " 10%(20) + 0%(x) = 5%(20+x) \n" ); document.write( "0.1(20)+ 0 = 0.05(20+x) Now simplify the terms \n" ); document.write( "2+0=1+0.05x \n" ); document.write( "2 = 1 + 0.05x Substract 1 from both sides \n" ); document.write( "2-1 = 1 +0.05x - 1 \n" ); document.write( "1 = 0.05x Divide both sides by 0.05 \n" ); document.write( "1/0.05 = 0.05x/0.05 \n" ); document.write( "x = 20 \n" ); document.write( "So, 20kg water must be added. \n" ); document.write( " |