document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=143924>Question 143924</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The formula 0.85x + 0.50(a-x) = 0.70a expresses the number of gallons x of a fungicide that is85% detergent and will be mixed with a 50% detergent solution to achieve a 70% detergent solution.  The 70% solution will fill a 10-gallon tank.  What is the value of \"a\" in the equation?\r<BR>\n" );
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document.write( "A.  0.7<BR>\n" );
document.write( "B.  0.35<BR>\n" );
document.write( "C.  1.40<BR>\n" );
document.write( "D.  10 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #104734 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=104734\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Now we know that the amount of pure detergent in the 85% solution (0.85x) plus the amount of pure detergent in the 50% solution (0.50(10-x)) has to equal the amount of pure detergent in the final mixture (0.70)*10, so our eq to solve is:\r<BR>\n" );
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document.write( "0.85x+0.50(10-x)=0.70*10, so a=10\r<BR>\n" );
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document.write( "Hope this helps---ptaylor </SPAN>\n" );
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