document.write( "Question 855903: A chemist has 40 ounces of a solution that is 30% acid. How many ounces of a 35% acid solution should he add to make a solution that is 33% acid?
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\n" ); document.write( "\n" ); document.write( " I tried: 40(30%)+x(35%)=33% but I came up with 1357/7 and that's not the right answer. I really have no clue how to set this problem up correctly. \n" ); document.write( "

Algebra.Com's Answer #515662 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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A chemist has 40 ounces of a solution that is 30% acid
\n" ); document.write( "How many ounces of a 35% acid solution should he add to make a solution that is 33% acid?
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\n" ); document.write( "Let x = amt of 35% acid
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\n" ); document.write( "Write a mixture equation using the decimal equiv of the percentages
\n" ); document.write( ".30(40) + .35x = .33(x+40)
\n" ); document.write( "12 + .35x = .33x + 13.2
\n" ); document.write( ".35x - .33x = 13.2 - 12
\n" ); document.write( ".02x = 1.2
\n" ); document.write( "x = 1.2/.02
\n" ); document.write( "x = 60 oz of 35% solution required
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\n" ); document.write( ":
\n" ); document.write( "Check this
\n" ); document.write( "12 + .35(60) = .33(100)
\n" ); document.write( "12 + 21 = 33; confirms our solution \n" ); document.write( "

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