document.write( "Question 414232: How many gallons of a 3% salt solution must be mixed with 30 gallons of a 9% solution to obtain a 6% solution? \n" ); document.write( "
Algebra.Com's Answer #290541 by mananth(16946)\"\" \"About 
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percent ---------------- quantity
\n" ); document.write( "9 ---------------- 30
\n" ); document.write( "3 ---------------- x
\n" ); document.write( "6 ---------------- 30+x
\n" ); document.write( "...
\n" ); document.write( "9*30+3*x =6(30+x)
\n" ); document.write( " 270+3x=180+6x
\n" ); document.write( "3x-6x=180-270
\n" ); document.write( "-3x=-90
\n" ); document.write( "/-3
\n" ); document.write( " x=30 liters
\n" ); document.write( " \n" ); document.write( "
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