document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=773211>Question 773211</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Andrew is now one quarter of his father's age. In 4 years he wil be one third of his father's age. How old are Andrew and his father now?<BR>\n" );
document.write( "I need help on setting up the equation and then solving.<BR>\n" );
document.write( "Let A=Andrew's age now.<BR>\n" );
document.write( "Let F=The fathers age now.<BR>\n" );
document.write( "I tried A=1/4*F.<BR>\n" );
document.write( "Then the second equation I wrote down is A+4=1/3*F+4.<BR>\n" );
document.write( "I dont't know what to do next. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #471391 by </B><A HREF=/tutors/aboutme.mpl?userid=John10><B>John10(297)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=John10><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=John10><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=471391\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hint: Substitute the first equation into the second equation for A:\r<BR>\n" );
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document.write( "(1/4)F + 4 = (1/3)(F + 4)\r<BR>\n" );
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document.write( "(1/4)F + 4 = (1/3)(F) + 4/3\r<BR>\n" );
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document.write( "(1/4)F - (1/3)F = -4 + 4/3\r<BR>\n" );
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document.write( "(-1/12)F = -8/3\r<BR>\n" );
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document.write( "F/12 = 8/3\r<BR>\n" );
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document.write( "F = (8/3)(12) = 32\r<BR>\n" );
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document.write( "A = (1/4)F = 32/4 = 8\r<BR>\n" );
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document.write( "Andrew is 8 years of age<BR>\n" );
document.write( "Father is 32 years of age\r<BR>\n" );
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document.write( "Hope it helps!\r<BR>\n" );
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document.write( "John10\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );