document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=510357>Question 510357</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a boat owner mixes together oil and gasoline to make 12 gallons of fuel for 8$ per gallon. Oil cost $15 per gallon and gasoline cost $3 per gallon. hOW MANY GALLONS OF EACH SHOULD USED???<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #341811 by </B><A HREF=/tutors/aboutme.mpl?userid=Maths68><B>Maths68(1474)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Maths68><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=Maths68><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=341811\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let<BR>\n" );
document.write( "Oil = x gallons<BR>\n" );
document.write( "Gasoline = y gallons<BR>\n" );
document.write( "Total cost of oil = 15x<BR>\n" );
document.write( "Total cost of Gasoline = 3y<BR>\n" );
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document.write( "Given<BR>\n" );
document.write( "Oil Quantity + Gasoline Quantity = Mixture Quantity<BR>\n" );
document.write( "x+y=12<BR>\n" );
document.write( "x=12-y ...............(1)<BR>\n" );
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document.write( "Total Cost of Oil + Total cost of Gasoline = Total Cost of Mixture<BR>\n" );
document.write( "15x+3y=12*8<BR>\n" );
document.write( "15x+3y=96 ..............(2)<BR>\n" );
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document.write( "Put the value of x from (1) to (2)\r<BR>\n" );
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document.write( "15(12-y)+3y=96<BR>\n" );
document.write( "180-15y+3y=96<BR>\n" );
document.write( "-12y=96-180<BR>\n" );
document.write( "-12y=-84<BR>\n" );
document.write( "-12y/-12=-84/-12<BR>\n" );
document.write( "-12y/-12=-84/-12<BR>\n" );
document.write( "y=7\r<BR>\n" );
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document.write( "Put the value of x in (1)<BR>\n" );
document.write( "x=12-y<BR>\n" );
document.write( "x=12-7<BR>\n" );
document.write( "x=5<BR>\n" );
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document.write( "Oil = x = 5 gallons<BR>\n" );
document.write( "Gasoline = y = 7 gallons<BR>\n" );
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document.write( "Check<BR>\n" );
document.write( "5*15 + 7*3 = 12*8<BR>\n" );
document.write( "75+21=96<BR>\n" );
document.write( "96=96<BR>\n" );
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