document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=176743>Question 176743</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a family there are two cars. The sum of the average miles per gallon obtained by the two cars in a particular week is 50 . The first car has consumed 30 gallons during that week, and the second has consumed 20 gallons, for a total of 1300  miles driven by the two cars combined. What was the average gas mileage obtained by each of the two cars in that week? <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 #131860 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10555)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=131860\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the amount of miles that the car that consumed 30 gallons of gas went, be x<BR>\n" );
document.write( "Then the amount of miles that the car that consumed 20 gallons of gas went, is 1,300 – x\r<BR>\n" );
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document.write( "Then,                            <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28x%29%2F%2830%29 ALIGN=MIDDLE  ALT=\"%28x%29%2F%2830%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >+<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%281300-x%29%2F%2820%29 ALIGN=MIDDLE  ALT=\"%281300-x%29%2F%2820%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >=<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=50 ALIGN=MIDDLE  ALT=\"50\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "2x    +   3(1,300   -   x)    =    3,000\r<BR>\n" );
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document.write( "2x   +   3,900   -   3x   =   3,000<BR>\n" );
document.write( "x     =     900\r<BR>\n" );
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document.write( "Since the car that consumed 30 gallons of gas went 900 miles that week, then the average gas mileage it got was 900  ÷  30   =  30 miles per gallon\r<BR>\n" );
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document.write( "Since the car that consumed 20 gallons of gas went 1,300 – 900, or 400 miles that same week, then the average gas mileage it got was 400  ÷  20   =  20 miles per gallon\r<BR>\n" );
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