document.write( "Question 24813: How many gallons of a 10% salt solution must be mixed with 20 gallons of a 25% salt solution to produce a 20% salt solution? \n" ); document.write( "
Algebra.Com's Answer #13240 by Paul(988)\"\" \"About 
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10x+25(20)= 20(x+20)
\n" ); document.write( "10x+500=20x+400 --> simplify
\n" ); document.write( "-10x=-100
\n" ); document.write( "x=10\r
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\n" ); document.write( "\n" ); document.write( "Hence about 10 gallons of 10% solution must be added.
\n" ); document.write( "Paul.
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