document.write( "Question 1054356: How many gallons of a 10% salt solution should be added to 20 gallons of a 60% salt solution to obtain a 50% salt solution? \n" ); document.write( "
Algebra.Com's Answer #669579 by addingup(3677)\"\" \"About 
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0.10x+0.60(20) = 0.50(x+20)
\n" ); document.write( "0.10x+12 = 0.50x+10 substract 0.10x and 10 from both sides
\n" ); document.write( "2 = 0.40x flip it
\n" ); document.write( "0.40x = 2 divide both sides by 0.40
\n" ); document.write( "x = 5 gallons of the 60% solution should be added to the 20 gallon to obtain a 50% solution
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