document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=415718>Question 415718</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Church plumbing charges $58 for a service call, plus $42 per hour for labor.  Ross plumbing charges $34 for a service call, plus $48 per hour for labor.  Find the length of time of a service call for which the 2 companies will charge the same amount. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #291386 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=291386\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let C be the total cost of Church Plumbing, R the total cost of Ross Plumbing<BR>\n" );
document.write( "Let h be the number of hours<BR>\n" );
document.write( "Then we have <BR>\n" );
document.write( "C=42h+58 (1)<BR>\n" );
document.write( "R=48h+34 (2)<BR>\n" );
document.write( "Set C=R<BR>\n" );
document.write( "42h+58=48h+34<BR>\n" );
document.write( "Solve for h: 6h=24, or h=4<BR>\n" );
document.write( "So answer is 4 hours </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );