document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=668133>Question 668133</A>: <I><SPAN STYLE=\"word-break: break-all;\"> n 4 hours, a man can move 12 blocks, and 3 rocks. In 3 hours, the SAME man can move 4 blocks, and 6 rocks. How long does it take that man to just move 1 block? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #415681 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=415681\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  In 4 hours, a man can move 12 blocks, and 3 rocks.<BR>\n" );
document.write( " In 3 hours, the SAME man can move 4 blocks, and 6 rocks.<BR>\n" );
document.write( " How long does it take that man to just move 1 block?<BR>\n" );
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document.write( "let b = time (in hrs) to move 1 block<BR>\n" );
document.write( "let r = time to move 1 rock<BR>\n" );
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document.write( "Write an equation for each scenario<BR>\n" );
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document.write( "12b + 3r = 4<BR>\n" );
document.write( "4b + 6r = 3<BR>\n" );
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document.write( "Multiply the 1st equation by 2, subtract the 2nd equation<BR>\n" );
document.write( "24b + 6r = 8<BR>\n" );
document.write( " 4b + 6r = 3<BR>\n" );
document.write( "-------------subtraction eliminates r, find b<BR>\n" );
document.write( "20b = 5<BR>\n" );
document.write( "b = 5/20<BR>\n" );
document.write( "b = 1/4 hr for the man to move one block </SPAN>\n" );
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