document.write( "Question 561085: you obtain 6 grams of a 7 % saline solution from a mixture of a 4 % saline solution. How much of the 14% saline solution is used in the mixture? \n" ); document.write( "
Algebra.Com's Answer #364148 by Maths68(1474)\"\" \"About 
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Solution A
\n" ); document.write( "Amount = x grams
\n" ); document.write( "Concentration =4% =0.04\r
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\n" ); document.write( "\n" ); document.write( "Solution B
\n" ); document.write( "Amount = 6-x grams
\n" ); document.write( "Concentration =14% = 0.14\r
\n" ); document.write( "\n" ); document.write( "Resultant Solution
\n" ); document.write( "Amount =6 grams
\n" ); document.write( "Concentration =7%=0.07\r
\n" ); document.write( "\n" ); document.write( "[Amount Solution A * Concentration A] + [Amount Solution B * Concentration of B] = Amount of Resultant * Concentration of resultant\r
\n" ); document.write( "\n" ); document.write( "x*0.4+(6-x)*0.14 = 6*0.07
\n" ); document.write( "0.04x+0.84-0.14x=0.42
\n" ); document.write( "0.04x-0.14x=-0.42-0.84
\n" ); document.write( "-0.1x=-0.42
\n" ); document.write( "-0.1x/-0.1=-0.42/0.1
\n" ); document.write( "x=4.2 grams\r
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\n" ); document.write( "\n" ); document.write( "Solution A
\n" ); document.write( "Amount = x grams = 4.2 grams
\n" ); document.write( "Concentration =4% =0.04\r
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\n" ); document.write( "\n" ); document.write( "Solution B
\n" ); document.write( "Amount = 6-x grams = 6-4.2 = 1.8 grams
\n" ); document.write( "Concentration =14% = 0.14\r
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\n" ); document.write( "\n" ); document.write( "1.8 grams of 14% saline solution is used in the mixture.
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