document.write( "Question 935672: Ana has a container of disinfectant concentrate and needs to dilute it to make up 5 litres of solution. If the ratio is one part disinfectant to every hundred parts of water, how many millilitres of concentrate will Ana need to use?
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Algebra.Com's Answer #568948 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+1%2F100+\"$ = ( liters disinfectant ) / ( water )
\n" ); document.write( " $\"+5+\"$ liters = disinfectant + water
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\n" ); document.write( "Liters of water = 5 - liters of disinfectant
\n" ); document.write( "Let $\"+x+\"$ = liters of disinfectant
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\n" ); document.write( " $\"+1%2F100+=+x+%2F+%28+5+-+x+%29+\"$
\n" ); document.write( "Multiply both sides by $\"+100%2A%28+5+-+x+%29+\"$
\n" ); document.write( " $\"+5+-+x+=+100x+\"$
\n" ); document.write( " $\"+101x+=+5+\"$
\n" ); document.write( " $\"+x+=+.0495+\"$ liters
\n" ); document.write( "Ana needs 49.5 ml of concentrate
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\n" ); document.write( "check:
\n" ); document.write( " $\"+1%2F100+=+x+%2F+%28+5+-+x+%29+\"$
\n" ); document.write( " $\"+1%2F100+=+.0495+%2F+%28+5+-+.0495+%29+\"$
\n" ); document.write( " $\"+.01+=+.0495+%2F+4.951+\"$
\n" ); document.write( " $\"+.01+=+.009998+\"$
\n" ); document.write( "close enough\r
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