document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=25494>Question 25494</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Paul earns $4 an hour working at the librabry and $8 an hour mowing lawns. This week he worked 25 hours and earned $164. How many hours did he work at the librabry. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #13684 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=13684\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> LEt the working hours in the libaray be x<BR>\n" );
document.write( "Let the workign hours of mowing a lawn be y<BR>\n" );
document.write( "Now total hours was 25.<BR>\n" );
document.write( "So x+y=25<BR>\n" );
document.write( "y=25-x (subsistution)<BR>\n" );
document.write( "Total money was $164<BR>\n" );
document.write( "SO 4x+8y=164<BR>\n" );
document.write( "Subsitute for y<BR>\n" );
document.write( "4x+8(25-x)=164<BR>\n" );
document.write( "4x-8x+200=164<BR>\n" );
document.write( "-4x=-36<BR>\n" );
document.write( "x=9<BR>\n" );
document.write( "y=25-9<BR>\n" );
document.write( "y=16\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Hence he worked for 9 hours at the libabary, and about 16 hours for mowing the lawn.<BR>\n" );
document.write( "Paul. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );