document.write( "Question 194470: How many gallons of a %15 acid solution must be mixed with 5gal.of a %20 solution to make a %16 solution? \n" ); document.write( "

Algebra.Com's Answer #146046 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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How many gallons of a %15 acid solution must be mixed with 5gal.
\n" ); document.write( "of a %20 solution to make a %16 solution?
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\n" ); document.write( "Let x = amt of 15% solution required
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\n" ); document.write( "A decimal amt of acid mixture equation:
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\n" ); document.write( ".15x + .20(5) = .16(x+5)
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\n" ); document.write( ".15x + 1 = .16x + .8
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\n" ); document.write( "1 - .8 = .16x - .15x
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\n" ); document.write( ".2 = .01x
\n" ); document.write( "x = $\".2%2F.01\"$
\n" ); document.write( "x = 20 gal of 15% solution required
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\n" ); document.write( "Check solution in original equation
\n" ); document.write( ".15(20) + .20(5) = .16(20 + 5)
\n" ); document.write( "3 + 1 = 4; confirms our answer \n" ); document.write( "

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