document.write( "Question 1146448: A hair dye is made by blending a 9% hydrogen peroxide solution and a 3% hydrogen peroxide solution.
\n" ); document.write( "How many milliliters of each are used to make a 300-milliliter solution that is 7% hydrogen peroxide?
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Algebra.Com's Answer #767699 by Alan3354(69443)\"\" \"About 
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A hair dye is made by blending a 9% hydrogen peroxide solution and a 3% hydrogen peroxide solution.
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\n" ); document.write( "n = amount of 9%
\n" ); document.write( "t = amount of 3%
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\n" ); document.write( "n + t = 300 ----- total solution
\n" ); document.write( "9n + 3t = 300*7 ---- total dye
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\n" ); document.write( "2 eqns in 2 variables.
\n" ); document.write( "Can you solve for n & t?\r
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