document.write( "Question 899242: You have a solution mixed at 8 g/ml and need 81 gallons mixed at 4 g/ml. How many gallons of water need to be added to the 8 g/ml solution? Round answers to the nearest tenth of a gallon \n" ); document.write( "
Algebra.Com's Answer #546264 by richwmiller(17219)\"\" \"About 
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from view of solution
\n" ); document.write( "81*0.08=0.04*(81+x)
\n" ); document.write( "6.48=3.24+0.04*x
\n" ); document.write( "6.48-3.24=0.04*x
\n" ); document.write( "3.24=0.04*x
\n" ); document.write( "x=81
\n" ); document.write( "check
\n" ); document.write( "81*0.08=0.04*(81+x)
\n" ); document.write( "81*0.08=0.04*(162)
\n" ); document.write( "6.48=6.48
\n" ); document.write( "ok\r
\n" ); document.write( "\n" ); document.write( "or from view of water
\n" ); document.write( "1*y+0.92*81=0.96(81+y)
\n" ); document.write( "1*y+74.52=77.76+0.96y
\n" ); document.write( "1*y-0.96y=77.76-74.52
\n" ); document.write( "0.04y=3.24
\n" ); document.write( "y=3.24/0.04
\n" ); document.write( "y=81\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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