document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=162165>Question 162165</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how much pure acid should be mixed with 7 gallons of 50% acid solution in order to get an 80% acid solution? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #119539 by </B><A HREF=/tutors/aboutme.mpl?userid=KnightOwlTutor><B>KnightOwlTutor(293)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KnightOwlTutor><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=KnightOwlTutor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=119539\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Pure acid is 100%<BR>\n" );
document.write( "Convert % into decimal form 100/100<BR>\n" );
document.write( "50%=50/100<BR>\n" );
document.write( "80%=80/100\r<BR>\n" );
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document.write( "X=# of gallons of pure acid\r<BR>\n" );
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document.write( "1*x+7(.5)=(x+7)(.8)\r<BR>\n" );
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document.write( "Use the distributive property\r<BR>\n" );
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document.write( "x+3.5=.8x+5.6\r<BR>\n" );
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document.write( "Subtract .8x from both sides\r<BR>\n" );
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document.write( ".2x+3.5=5.6\r<BR>\n" );
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document.write( "Subtract 3.5 from both sides\r<BR>\n" );
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document.write( ".2x=2.1\r<BR>\n" );
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document.write( "Divide both sides by .2\r<BR>\n" );
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document.write( "x=10.5 gallons of pure acid\r<BR>\n" );
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document.write( "Let's double check our answer\r<BR>\n" );
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document.write( "10.5+3.5=(10.5+7)(.8)\r<BR>\n" );
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document.write( "14=14 </SPAN>\n" );
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