document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=582880>Question 582880</A>: <I><SPAN STYLE=\"word-break: break-all;\"> need to come up with two equations, with x and y\r<BR>\n" );
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document.write( "A bricklayer lays an average of 150 bricks per hour.  During a job, he is called away and replaced by a less experienced man, who averages 120 bricks per hour.  The two men laid 930  bricks in 7 hours.  How long did each work? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #372270 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=372270\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A bricklayer lays an average of 150 bricks per hour.<BR>\n" );
document.write( " During a job, he is called away and replaced by a less experienced man, who averages 120 bricks per hour.<BR>\n" );
document.write( " The two men laid 930 bricks in 7 hours. How long did each work?<BR>\n" );
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document.write( "Let x = time worked by the experienced bricklayer<BR>\n" );
document.write( "Let y = time worked by apprentice <BR>\n" );
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document.write( "Time equation<BR>\n" );
document.write( "x + y = 7<BR>\n" );
document.write( "y = (7-x); use this form for substitution<BR>\n" );
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document.write( "Production equation<BR>\n" );
document.write( "150x + 120y = 930<BR>\n" );
document.write( "replace y with (7-x), find x<BR>\n" );
document.write( "150x + 120(7-x) = 930<BR>\n" );
document.write( "150x + 840 - 120x = 930<BR>\n" );
document.write( "150x - 120x = 930 - 840<BR>\n" );
document.write( "30x = 90<BR>\n" );
document.write( "x = 90/30<BR>\n" );
document.write( "x = 3 hrs worked the exp guy<BR>\n" );
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document.write( "You can find the hrs worked by the other guy. check solutions in the production equation </SPAN>\n" );
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