document.write( "Question 403306: A chemist needs 130 milliliters of a 31% solution but has only 17% and 43% solutions availble. Find how many millimiters of each that should be mixed to get the desired solution. \n" ); document.write( "
Algebra.Com's Answer #285205 by Alan3354(69443)\"\" \"About 
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A chemist needs 130 milliliters of a 31% solution but has only 17% and 43% solutions availble. Find how many millimiters of each that should be mixed to get the desired solution.
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\n" ); document.write( "f = amount of 43%
\n" ); document.write( "s = amount of 17%
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\n" ); document.write( "f + s = 130 (total solution)
\n" ); document.write( "0.43f + 0.17s = 130*0.31 (total of what's in the solution)
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\n" ); document.write( "43f + 17s = 4030
\n" ); document.write( "s = 130 - f
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\n" ); document.write( "43f + 17(130-f) = 4030
\n" ); document.write( "26f = 1820
\n" ); document.write( "f = 70 ml
\n" ); document.write( "s = 60 ml
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