document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1137792>Question 1137792</A>: <I><SPAN STYLE=\"word-break: break-all;\"> During one month, a homeowner used 700 units of electricity and 100 units of gas for a total cost of $416. The next month, 500 units of electricity and 250 units of gas were used for a total cost of $365. Find the cost per unit of gas.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #755684 by </B><A HREF=/tutors/aboutme.mpl?userid=dkppathak><B>dkppathak(439)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dkppathak><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=dkppathak><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=755684\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> During one month, a homeowner used 700 units of electricity and 100 units of gas for a total cost of $416. The next month, 500 units of electricity and 250 units of gas were used for a total cost of $365. Find the cost per unit of gas.<BR>\n" );
document.write( "solution let cost of electricity x and gas is y per unit<BR>\n" );
document.write( "700x+100y=416   (1)<BR>\n" );
document.write( "500x+250y= 365   (2)    by multiplying  5 first and 2 to second equation<BR>\n" );
document.write( "3500x +500y= 2080<BR>\n" );
document.write( "1000x+500y=  730  by solving elimination method <BR>\n" );
document.write( " 2500x= 1350<BR>\n" );
document.write( "X=$0.54  per unit   similarly   270+250y= 365    250y=  95     y=  $ 0.38 per unit <BR>\n" );
document.write( "answer $0.38 per unit gas cost\r<BR>\n" );
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