document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=598912>Question 598912</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a worker needs to form 12 gallons of 70% ammonia solution to strip wax from some floors. He has one solution of 30% ammonia and another solution of 90% ammonia. How many gallons of the 90% solution should he use in the mixture? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #378718 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=378718\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a worker needs to form 12 gallons of 70% ammonia solution to strip wax from some floors. He has one solution of 30% ammonia and another solution of 90% ammonia. How many gallons of the 90% solution should he use in the mixture?<BR>\n" );
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document.write( "Equation:<BR>\n" );
document.write( "ammonia + ammonia = ammonia<BR>\n" );
document.write( "0.30x + 0.90(12-x) = 0.70*12<BR>\n" );
document.write( "----------<BR>\n" );
document.write( "30x + 90*12 - 90x = 70*12<BR>\n" );
document.write( "-60x = -20*12<BR>\n" );
document.write( "x = 4 gallons (amt. of 30% solution needed)<BR>\n" );
document.write( "-----<BR>\n" );
document.write( "12-x = 8 gallons (amt. of 90% solution needed)<BR>\n" );
document.write( "================================================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );