document.write( "Question 423721: a lab needs to make 100 gallons of a 18% acid solution by mixing a 12% acid solution with 20% solution. How many gallons of each solution is needed? \n" ); document.write( "
Algebra.Com's Answer #295485 by mananth(16946)\"\" \"About 
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percent ---------------- quantity
\n" ); document.write( "12 ---------------- x
\n" ); document.write( "20 ---------------- 100-x
\n" ); document.write( "Total18.00%--------------100 ......
\n" ); document.write( "12x+20(100-x)=18*100
\n" ); document.write( "12x+2000 -20x=1800
\n" ); document.write( "12x-20x= 1800-2000
\n" ); document.write( "-8x=-200
\n" ); document.write( "/-8
\n" ); document.write( "x=25 liters of 12.00% \r
\n" ); document.write( "\n" ); document.write( "75 liters of 20.00%
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